Matlab Error: ()-indexing must appear last in an index expression

Question

I have this code and want to write an array in a tab delimited txt file :

fid = fopen(\'oo.txt\', \'wt+\');
for x = 1 :length(s)
fprintf(fid, \'%s\\t\\n\',           


        

Answer 1

With MATLAB, you cannot immediately index into the result of a function using () without first assigning it to a temporary variable (Octave does allow this though). This is due to some of the ambiguities that happen when you allow this.

tmp = s(x);
fprintf(fid, '%s\t\n',  tmp(1)) ;

There are some ways around this but they aren't pretty

It is unclear what exactly your data structure is, but it looks like s is a cell so you should really be using {} indexing to access it's contents

fprintf(fid, '%s\t\n', s{x});

Update

If you're trying to read individual words in from your input file and then write those out to a tab-delimited file, I'd probably do something like the following:

fid = fopen('input.txt', 'r');
contents = fread(fid, '*char')';
fclose(fid)

% Break a string into words and yield a cell array of strings
words = regexp(contents, '\s+', 'split');

% Write these out to a file separated by tabs
fout = fopen('output.tsv', 'w');
fprintf(fout, '%s\t', words{:});
fclose(fout)