Preprocess email
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1 changed files with 16 additions and 18 deletions
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@ -1,9 +1,9 @@
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function word_indices = processEmail(email_contents)
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%PROCESSEMAIL preprocesses a the body of an email and
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%returns a list of word_indices
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% word_indices = PROCESSEMAIL(email_contents) preprocesses
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% the body of an email and returns a list of indices of the
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% words contained in the email.
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%returns a list of word_indices
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% word_indices = PROCESSEMAIL(email_contents) preprocesses
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% the body of an email and returns a list of indices of the
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% words contained in the email.
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%
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% Load Vocabulary
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@ -60,13 +60,13 @@ while ~isempty(email_contents)
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[str, email_contents] = ...
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strtok(email_contents, ...
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[' @$/#.-:&*+=[]?!(){},''">_<;%' char(10) char(13)]);
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% Remove any non alphanumeric characters
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str = regexprep(str, '[^a-zA-Z0-9]', '');
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% Stem the word
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% Stem the word
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% (the porterStemmer sometimes has issues, so we use a try catch block)
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try str = porterStemmer(strtrim(str));
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try str = porterStemmer(strtrim(str));
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catch str = ''; continue;
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end;
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@ -87,24 +87,22 @@ while ~isempty(email_contents)
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% vector. Concretely, if str = 'action', then you should
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% look up the vocabulary list to find where in vocabList
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% 'action' appears. For example, if vocabList{18} =
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% 'action', then, you should add 18 to the word_indices
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% 'action', then, you should add 18 to the word_indices
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% vector (e.g., word_indices = [word_indices ; 18]; ).
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%
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%
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% Note: vocabList{idx} returns a the word with index idx in the
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% vocabulary list.
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%
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%
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% Note: You can use strcmp(str1, str2) to compare two strings (str1 and
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% str2). It will return 1 only if the two strings are equivalent.
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%
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for idx = 1:length(vocabList)
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if strcmp(str, vocabList{idx})
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word_indices = [word_indices ; idx];
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break;
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end
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end
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% =============================================================
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