MATLAB: How to vectorize writing to a txt file

Question

Hi there,

I have to write a function in matlab to create a txt file with the following format:

(x(1),y(1)),(x(2),y(2)),…(x(end),y(end))

I have the following piece of code (whre L is the length of vectors x and y)

for r=1:L;fprintf(fileOutput,['(',num2str(time(r)),',',num2str(signal(r)),'), ']);end

which obviously does the trick but I was wondering if anybody knows how to vectorize the expresion so that it runs much faster.

Any help will be welcomed!!

Thank you!

Answer 1

You could go for something like this:

 buffer = sprintf('(%f,%f),', [time; signal]) ;    % FormatSpec repeated.
 buffer(end) = [] ;                                % Remove extra ','.
 fid = fopen('output.txt', 'w') ;
 fwrite(fid, buffer) ;
 fclose(fid) ;