Compare .txt to a string.

How can you compare each line of a .txt file to a string?

Answer 1

[Joseph Cheng]

you can use the function strcmp(). which will compare two strings.

to expand a bit more you can look up the function fgetl() which has the example

          fid=fopen('fgetl.m');
          while 1
              tline = fgetl(fid);
              if ~ischar(tline), break, end
              disp(tline)
          end
          fclose(fid);

and then using strcmp() you'd insert in the for-loop

 same = strcmp(tline,'comparisonstrings');

i'll leave it to you to figure out how you want to save/store the results.

[Bob Whiley]

Could you use all instead of strcmp?

[Guillaume]

Not if the strings are different length (which will most likely occur). strcmp is the function to compare strings.

Answer 2

[Guillaume]

filelines = strsplit(fileread('sometextfile'), '\n');
issamestring = strcmp(filelines, 'stringtomatch')

[per isakson]

Use strtrim to avoid trailing space of the text file.

[Guillaume]

That's assuming you don't want to compare the spaces.