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575 lines
17 KiB
Matlab
575 lines
17 KiB
Matlab
function submit(partId, webSubmit)
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%SUBMIT Submit your code and output to the ml-class servers
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% SUBMIT() will connect to the ml-class server and submit your solution
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fprintf('==\n== [ml-class] Submitting Solutions | Programming Exercise %s\n==\n', ...
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homework_id());
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if ~exist('partId', 'var') || isempty(partId)
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partId = promptPart();
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end
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if ~exist('webSubmit', 'var') || isempty(webSubmit)
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webSubmit = 0; % submit directly by default
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end
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% Check valid partId
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partNames = validParts();
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if ~isValidPartId(partId)
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fprintf('!! Invalid homework part selected.\n');
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fprintf('!! Expected an integer from 1 to %d.\n', numel(partNames) + 1);
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fprintf('!! Submission Cancelled\n');
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return
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end
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if ~exist('ml_login_data.mat','file')
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[login password] = loginPrompt();
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save('ml_login_data.mat','login','password');
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else
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load('ml_login_data.mat');
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[login password] = quickLogin(login, password);
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save('ml_login_data.mat','login','password');
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end
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if isempty(login)
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fprintf('!! Submission Cancelled\n');
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return
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end
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fprintf('\n== Connecting to ml-class ... ');
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if exist('OCTAVE_VERSION')
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fflush(stdout);
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end
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% Setup submit list
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if partId == numel(partNames) + 1
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submitParts = 1:numel(partNames);
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else
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submitParts = [partId];
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end
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for s = 1:numel(submitParts)
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thisPartId = submitParts(s);
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if (~webSubmit) % submit directly to server
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[login, ch, signature, auxstring] = getChallenge(login, thisPartId);
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if isempty(login) || isempty(ch) || isempty(signature)
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% Some error occured, error string in first return element.
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fprintf('\n!! Error: %s\n\n', login);
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return
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end
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% Attempt Submission with Challenge
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ch_resp = challengeResponse(login, password, ch);
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[result, str] = submitSolution(login, ch_resp, thisPartId, ...
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output(thisPartId, auxstring), source(thisPartId), signature);
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partName = partNames{thisPartId};
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fprintf('\n== [ml-class] Submitted Assignment %s - Part %d - %s\n', ...
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homework_id(), thisPartId, partName);
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fprintf('== %s\n', strtrim(str));
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if exist('OCTAVE_VERSION')
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fflush(stdout);
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end
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else
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[result] = submitSolutionWeb(login, thisPartId, output(thisPartId), ...
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source(thisPartId));
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result = base64encode(result);
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fprintf('\nSave as submission file [submit_ex%s_part%d.txt (enter to accept default)]:', ...
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homework_id(), thisPartId);
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saveAsFile = input('', 's');
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if (isempty(saveAsFile))
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saveAsFile = sprintf('submit_ex%s_part%d.txt', homework_id(), thisPartId);
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end
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fid = fopen(saveAsFile, 'w');
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if (fid)
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fwrite(fid, result);
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fclose(fid);
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fprintf('\nSaved your solutions to %s.\n\n', saveAsFile);
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fprintf(['You can now submit your solutions through the web \n' ...
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'form in the programming exercises. Select the corresponding \n' ...
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'programming exercise to access the form.\n']);
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else
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fprintf('Unable to save to %s\n\n', saveAsFile);
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fprintf(['You can create a submission file by saving the \n' ...
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'following text in a file: (press enter to continue)\n\n']);
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pause;
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fprintf(result);
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end
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end
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end
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end
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% ================== CONFIGURABLES FOR EACH HOMEWORK ==================
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function id = homework_id()
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id = '2';
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end
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function [partNames] = validParts()
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partNames = { 'Sigmoid Function ', ...
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'Logistic Regression Cost', ...
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'Logistic Regression Gradient', ...
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'Predict', ...
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'Regularized Logistic Regression Cost' ...
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'Regularized Logistic Regression Gradient' ...
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};
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end
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function srcs = sources()
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% Separated by part
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srcs = { { 'sigmoid.m' }, ...
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{ 'costFunction.m' }, ...
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{ 'costFunction.m' }, ...
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{ 'predict.m' }, ...
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{ 'costFunctionReg.m' }, ...
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{ 'costFunctionReg.m' } };
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end
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function out = output(partId, auxstring)
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% Random Test Cases
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X = [ones(20,1) (exp(1) * sin(1:1:20))' (exp(0.5) * cos(1:1:20))'];
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y = sin(X(:,1) + X(:,2)) > 0;
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if partId == 1
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out = sprintf('%0.5f ', sigmoid(X));
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elseif partId == 2
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out = sprintf('%0.5f ', costFunction([0.25 0.5 -0.5]', X, y));
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elseif partId == 3
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[cost, grad] = costFunction([0.25 0.5 -0.5]', X, y);
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out = sprintf('%0.5f ', grad);
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elseif partId == 4
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out = sprintf('%0.5f ', predict([0.25 0.5 -0.5]', X));
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elseif partId == 5
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out = sprintf('%0.5f ', costFunctionReg([0.25 0.5 -0.5]', X, y, 0.1));
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elseif partId == 6
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[cost, grad] = costFunctionReg([0.25 0.5 -0.5]', X, y, 0.1);
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out = sprintf('%0.5f ', grad);
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end
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end
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% ====================== SERVER CONFIGURATION ===========================
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% ***************** REMOVE -staging WHEN YOU DEPLOY *********************
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function url = site_url()
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url = 'http://class.coursera.org/ml-007';
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end
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function url = challenge_url()
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url = [site_url() '/assignment/challenge'];
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end
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function url = submit_url()
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url = [site_url() '/assignment/submit'];
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end
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% ========================= CHALLENGE HELPERS =========================
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function src = source(partId)
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src = '';
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src_files = sources();
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if partId <= numel(src_files)
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flist = src_files{partId};
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for i = 1:numel(flist)
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fid = fopen(flist{i});
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if (fid == -1)
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error('Error opening %s (is it missing?)', flist{i});
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end
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line = fgets(fid);
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while ischar(line)
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src = [src line];
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line = fgets(fid);
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end
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fclose(fid);
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src = [src '||||||||'];
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end
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end
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end
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function ret = isValidPartId(partId)
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partNames = validParts();
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ret = (~isempty(partId)) && (partId >= 1) && (partId <= numel(partNames) + 1);
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end
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function partId = promptPart()
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fprintf('== Select which part(s) to submit:\n');
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partNames = validParts();
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srcFiles = sources();
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for i = 1:numel(partNames)
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fprintf('== %d) %s [', i, partNames{i});
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fprintf(' %s ', srcFiles{i}{:});
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fprintf(']\n');
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end
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fprintf('== %d) All of the above \n==\nEnter your choice [1-%d]: ', ...
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numel(partNames) + 1, numel(partNames) + 1);
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selPart = input('', 's');
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partId = str2num(selPart);
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if ~isValidPartId(partId)
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partId = -1;
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end
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end
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function [email,ch,signature,auxstring] = getChallenge(email, part)
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str = urlread(challenge_url(), 'post', {'email_address', email, 'assignment_part_sid', [homework_id() '-' num2str(part)], 'response_encoding', 'delim'});
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str = strtrim(str);
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r = struct;
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while(numel(str) > 0)
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[f, str] = strtok (str, '|');
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[v, str] = strtok (str, '|');
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r = setfield(r, f, v);
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end
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email = getfield(r, 'email_address');
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ch = getfield(r, 'challenge_key');
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signature = getfield(r, 'state');
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auxstring = getfield(r, 'challenge_aux_data');
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end
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function [result, str] = submitSolutionWeb(email, part, output, source)
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result = ['{"assignment_part_sid":"' base64encode([homework_id() '-' num2str(part)], '') '",' ...
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'"email_address":"' base64encode(email, '') '",' ...
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'"submission":"' base64encode(output, '') '",' ...
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'"submission_aux":"' base64encode(source, '') '"' ...
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'}'];
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str = 'Web-submission';
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end
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function [result, str] = submitSolution(email, ch_resp, part, output, ...
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source, signature)
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params = {'assignment_part_sid', [homework_id() '-' num2str(part)], ...
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'email_address', email, ...
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'submission', base64encode(output, ''), ...
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'submission_aux', base64encode(source, ''), ...
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'challenge_response', ch_resp, ...
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'state', signature};
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str = urlread(submit_url(), 'post', params);
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% Parse str to read for success / failure
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result = 0;
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end
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% =========================== LOGIN HELPERS ===========================
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function [login password] = loginPrompt()
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% Prompt for password
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[login password] = basicPrompt();
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if isempty(login) || isempty(password)
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login = []; password = [];
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end
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end
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function [login password] = basicPrompt()
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login = input('Login (Email address): ', 's');
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password = input('Password: ', 's');
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end
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function [login password] = quickLogin(login,password)
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disp(['You are currently logged in as ' login '.']);
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cont_token = input('Is this you? (y/n - type n to reenter password)','s');
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if(isempty(cont_token) || cont_token(1)=='Y'||cont_token(1)=='y')
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return;
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else
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[login password] = loginPrompt();
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end
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end
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function [str] = challengeResponse(email, passwd, challenge)
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str = sha1([challenge passwd]);
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end
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% =============================== SHA-1 ================================
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function hash = sha1(str)
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% Initialize variables
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h0 = uint32(1732584193);
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h1 = uint32(4023233417);
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h2 = uint32(2562383102);
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h3 = uint32(271733878);
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h4 = uint32(3285377520);
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% Convert to word array
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strlen = numel(str);
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% Break string into chars and append the bit 1 to the message
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mC = [double(str) 128];
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mC = [mC zeros(1, 4-mod(numel(mC), 4), 'uint8')];
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numB = strlen * 8;
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if exist('idivide')
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numC = idivide(uint32(numB + 65), 512, 'ceil');
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else
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numC = ceil(double(numB + 65)/512);
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end
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numW = numC * 16;
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mW = zeros(numW, 1, 'uint32');
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idx = 1;
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for i = 1:4:strlen + 1
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mW(idx) = bitor(bitor(bitor( ...
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bitshift(uint32(mC(i)), 24), ...
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bitshift(uint32(mC(i+1)), 16)), ...
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bitshift(uint32(mC(i+2)), 8)), ...
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uint32(mC(i+3)));
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idx = idx + 1;
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end
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% Append length of message
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mW(numW - 1) = uint32(bitshift(uint64(numB), -32));
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mW(numW) = uint32(bitshift(bitshift(uint64(numB), 32), -32));
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% Process the message in successive 512-bit chs
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for cId = 1 : double(numC)
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cSt = (cId - 1) * 16 + 1;
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cEnd = cId * 16;
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ch = mW(cSt : cEnd);
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% Extend the sixteen 32-bit words into eighty 32-bit words
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for j = 17 : 80
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ch(j) = ch(j - 3);
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ch(j) = bitxor(ch(j), ch(j - 8));
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ch(j) = bitxor(ch(j), ch(j - 14));
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ch(j) = bitxor(ch(j), ch(j - 16));
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ch(j) = bitrotate(ch(j), 1);
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end
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% Initialize hash value for this ch
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a = h0;
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b = h1;
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c = h2;
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d = h3;
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e = h4;
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% Main loop
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for i = 1 : 80
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if(i >= 1 && i <= 20)
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f = bitor(bitand(b, c), bitand(bitcmp(b), d));
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k = uint32(1518500249);
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elseif(i >= 21 && i <= 40)
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f = bitxor(bitxor(b, c), d);
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k = uint32(1859775393);
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elseif(i >= 41 && i <= 60)
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f = bitor(bitor(bitand(b, c), bitand(b, d)), bitand(c, d));
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k = uint32(2400959708);
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elseif(i >= 61 && i <= 80)
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f = bitxor(bitxor(b, c), d);
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k = uint32(3395469782);
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end
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t = bitrotate(a, 5);
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t = bitadd(t, f);
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t = bitadd(t, e);
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t = bitadd(t, k);
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t = bitadd(t, ch(i));
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e = d;
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d = c;
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c = bitrotate(b, 30);
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b = a;
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a = t;
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end
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h0 = bitadd(h0, a);
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h1 = bitadd(h1, b);
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h2 = bitadd(h2, c);
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h3 = bitadd(h3, d);
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h4 = bitadd(h4, e);
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end
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hash = reshape(dec2hex(double([h0 h1 h2 h3 h4]), 8)', [1 40]);
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hash = lower(hash);
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end
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function ret = bitadd(iA, iB)
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ret = double(iA) + double(iB);
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ret = bitset(ret, 33, 0);
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ret = uint32(ret);
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end
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function ret = bitrotate(iA, places)
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t = bitshift(iA, places - 32);
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ret = bitshift(iA, places);
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ret = bitor(ret, t);
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end
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% =========================== Base64 Encoder ============================
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% Thanks to Peter John Acklam
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%
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function y = base64encode(x, eol)
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%BASE64ENCODE Perform base64 encoding on a string.
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%
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% BASE64ENCODE(STR, EOL) encode the given string STR. EOL is the line ending
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% sequence to use; it is optional and defaults to '\n' (ASCII decimal 10).
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% The returned encoded string is broken into lines of no more than 76
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% characters each, and each line will end with EOL unless it is empty. Let
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% EOL be empty if you do not want the encoded string broken into lines.
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%
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% STR and EOL don't have to be strings (i.e., char arrays). The only
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% requirement is that they are vectors containing values in the range 0-255.
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%
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% This function may be used to encode strings into the Base64 encoding
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% specified in RFC 2045 - MIME (Multipurpose Internet Mail Extensions). The
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% Base64 encoding is designed to represent arbitrary sequences of octets in a
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% form that need not be humanly readable. A 65-character subset
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% ([A-Za-z0-9+/=]) of US-ASCII is used, enabling 6 bits to be represented per
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% printable character.
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%
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% Examples
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% --------
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%
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% If you want to encode a large file, you should encode it in chunks that are
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% a multiple of 57 bytes. This ensures that the base64 lines line up and
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% that you do not end up with padding in the middle. 57 bytes of data fills
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% one complete base64 line (76 == 57*4/3):
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%
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% If ifid and ofid are two file identifiers opened for reading and writing,
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% respectively, then you can base64 encode the data with
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%
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% while ~feof(ifid)
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% fwrite(ofid, base64encode(fread(ifid, 60*57)));
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% end
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%
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% or, if you have enough memory,
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%
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% fwrite(ofid, base64encode(fread(ifid)));
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%
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% See also BASE64DECODE.
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% Author: Peter John Acklam
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% Time-stamp: 2004-02-03 21:36:56 +0100
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% E-mail: pjacklam@online.no
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% URL: http://home.online.no/~pjacklam
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if isnumeric(x)
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x = num2str(x);
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end
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% make sure we have the EOL value
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if nargin < 2
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eol = sprintf('\n');
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else
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if sum(size(eol) > 1) > 1
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error('EOL must be a vector.');
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end
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if any(eol(:) > 255)
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error('EOL can not contain values larger than 255.');
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end
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end
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if sum(size(x) > 1) > 1
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error('STR must be a vector.');
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end
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x = uint8(x);
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eol = uint8(eol);
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ndbytes = length(x); % number of decoded bytes
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nchunks = ceil(ndbytes / 3); % number of chunks/groups
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nebytes = 4 * nchunks; % number of encoded bytes
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% add padding if necessary, to make the length of x a multiple of 3
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if rem(ndbytes, 3)
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x(end+1 : 3*nchunks) = 0;
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end
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x = reshape(x, [3, nchunks]); % reshape the data
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y = repmat(uint8(0), 4, nchunks); % for the encoded data
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% Split up every 3 bytes into 4 pieces
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%
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% aaaaaabb bbbbcccc ccdddddd
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%
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% to form
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%
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% 00aaaaaa 00bbbbbb 00cccccc 00dddddd
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%
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y(1,:) = bitshift(x(1,:), -2); % 6 highest bits of x(1,:)
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y(2,:) = bitshift(bitand(x(1,:), 3), 4); % 2 lowest bits of x(1,:)
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y(2,:) = bitor(y(2,:), bitshift(x(2,:), -4)); % 4 highest bits of x(2,:)
|
|
|
|
y(3,:) = bitshift(bitand(x(2,:), 15), 2); % 4 lowest bits of x(2,:)
|
|
y(3,:) = bitor(y(3,:), bitshift(x(3,:), -6)); % 2 highest bits of x(3,:)
|
|
|
|
y(4,:) = bitand(x(3,:), 63); % 6 lowest bits of x(3,:)
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Now perform the following mapping
|
|
%
|
|
% 0 - 25 -> A-Z
|
|
% 26 - 51 -> a-z
|
|
% 52 - 61 -> 0-9
|
|
% 62 -> +
|
|
% 63 -> /
|
|
%
|
|
% We could use a mapping vector like
|
|
%
|
|
% ['A':'Z', 'a':'z', '0':'9', '+/']
|
|
%
|
|
% but that would require an index vector of class double.
|
|
%
|
|
z = repmat(uint8(0), size(y));
|
|
i = y <= 25; z(i) = 'A' + double(y(i));
|
|
i = 26 <= y & y <= 51; z(i) = 'a' - 26 + double(y(i));
|
|
i = 52 <= y & y <= 61; z(i) = '0' - 52 + double(y(i));
|
|
i = y == 62; z(i) = '+';
|
|
i = y == 63; z(i) = '/';
|
|
y = z;
|
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% Add padding if necessary.
|
|
%
|
|
npbytes = 3 * nchunks - ndbytes; % number of padding bytes
|
|
if npbytes
|
|
y(end-npbytes+1 : end) = '='; % '=' is used for padding
|
|
end
|
|
|
|
if isempty(eol)
|
|
|
|
% reshape to a row vector
|
|
y = reshape(y, [1, nebytes]);
|
|
|
|
else
|
|
|
|
nlines = ceil(nebytes / 76); % number of lines
|
|
neolbytes = length(eol); % number of bytes in eol string
|
|
|
|
% pad data so it becomes a multiple of 76 elements
|
|
y = [y(:) ; zeros(76 * nlines - numel(y), 1)];
|
|
y(nebytes + 1 : 76 * nlines) = 0;
|
|
y = reshape(y, 76, nlines);
|
|
|
|
% insert eol strings
|
|
eol = eol(:);
|
|
y(end + 1 : end + neolbytes, :) = eol(:, ones(1, nlines));
|
|
|
|
% remove padding, but keep the last eol string
|
|
m = nebytes + neolbytes * (nlines - 1);
|
|
n = (76+neolbytes)*nlines - neolbytes;
|
|
y(m+1 : n) = '';
|
|
|
|
% extract and reshape to row vector
|
|
y = reshape(y, 1, m+neolbytes);
|
|
|
|
end
|
|
|
|
% output is a character array
|
|
y = char(y);
|
|
|
|
end
|