how can I read multiple text files in matlab?

Question

if possible please let me know that how I can read different text files in Matlab . considering that there is 33 txt files that every one should process. it is my code which has error. :(

 textFilename = cell(1,33);
        id = cell(1,33);
        for k=1:33;
        textFilename{k} = fullfile('C:\Users\Desktop\SentimentCode\textfiles',['file' num2str(k)     '.txt']);
        id{k} = fopen(textFilename{k},'rt'); 
        str{k} = textscan(id{k},'%s%s'); 

    end                                                      
    str(str == '.') = '';
    str(str == '_') = '';
    str(str == '-') = '';


% Remove numbers from text
    T =regexprep(str, '[\d]', ' ');                                  

  and my error is :   ??? Undefined function or method 'eq' for input arguments of type 'cell'.

Error in ==> Untitled9 at 23
str(str == '.') = '';

many thanks for your reply .. I edited my post and add some lines more and the errors I appreciate you for your answering — Roze, May 31 '14 at 11:27
and the explanation of the error also is : The size of the indicated variable or array appears to be changing with each loop iteration. — Roze, May 31 '14 at 12:17

score 0 · Answer 1 · answered May 31 '14 at 01:28

0

Just by looking at the example code:

extFilename{k} = fullfile(..);

should be

textFilename{k} = fullfile(...);

Also it is good idea to close the files after you read them: fclose(id{k})

answered May 31 '14 at 01:28

Marcin

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score 0 · Accepted Answer · answered Jun 01 '14 at 09:14

In your current edit your error seem more directed to the removal of . - and _ characters. The == comparasion works better with character strings while textscan returns a cell

Instead of

str(str == '.') = '';
str(str == '_') = '';
str(str == '-') = '';

try using

regexprep(str,'(\.|-|_)','')

to replace all at once (the '\.' is needed as '.' is a special character). This works on cellstrings so depending on how deep your cell structure goes you might need to call it within a for loop, str{k},str{k}{1}, str{k}{i} etc... An alternative could be to look at cellfun or/and strjoin... depending on how your data are arranged in the files.

how can I read multiple text files in matlab?

2 Answers2