AND operation for different textfiles in MATLAB

Sorry, i could not able to edit/comment on my previous qquestion AND operation for textfiles in MATLAB

I've 3 .txt files. I want to perform and operation to these 3 text files and to save the output in a new text file.

    fid = fopen(AND('a.txt','b.txt','c.txt'));

I don't know this is correct or not, will this work as per my requirements? but i want to save in a new text file, how can i go for it?

For example my a.txt file contents are

    DSC01605.bmp
    Hampi8.bmp
     DSC01633.bmp
    DSC01198.bmp
    DSC01619.bmp

similarly some images are present in b.txt file, and hence in c.txt file. I just want to get similar image names out of those files which are saved in above text files, and want to save in a separate new text file.

[Image Analyst]

Why were you not able to edit your original question? What happened when you clicked the edit link? Please tell [e-mail] so they can fix it.

[Jan]

@Chetan: Posting multiple messages about the same problem is not efficient in a forum, because it wastes the time of the readers.

AND() is a logical operation. Applying it to the file names is a very strange idea, because you want to process the file contents.

Answer 1

[Image Analyst]

Use ismember():

first read the files into cell arrays. Then:

file1 = {'DSC01605.bmp';'Hampi8.bmp';'DSC01633.bmp';...
 'DSC01198.bmp';'DSC01619.bmp'}

file2 = {'DSC01605.bmp';'Hampi8.bmp';'DSC01633.bmp'}

file3 = {'DSC01605.bmp';'Hampi8.bmp'}

matching12 = ismember(file1, file2)
matching13 = ismember(file1, file3)
matchesAll3 = matching12 & matching13

allMatchingStrings = file1(matchesAll3)

[Chethan]

Well thank you, Now allMatchingStrings contains

    'DSC01605.bmp'
    'Hampi8.bmp'

How can i write these files to a new text file all.txt? Problem with my requirements is - suppose allMatchingStrings contains around 10 files, but i need only 5 out of those 10 files. I need to save 5 files to a new text file say all.txt. How can i do that?

[Image Analyst]

Use fopen(), fprintf(), and fclose() to write strings to a text file. You will have to decide which of the strings to save. I have no idea, and MATLAB will know only after you tell it.