Export Data via fprintf printing something else besides NaN

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Brian
Brian on 25 Nov 2013
Commented: Brian on 25 Nov 2013
Hi, I have a simple export loop that is writing the contents of a matrix to a text file for another system to read. The issue is that the other system doesn't like NaN as part of a numeric array and I need to print a blank space instead. How can I go about doing this?
On occasion my MacroData matrix Contains NaN's. Is there a way for me to do a find replace while I'm in the file itself, or simple replace the NaN output with a blank?
f_format = '%s%f%f\r\n';
count = 1;
for i = 1:length(UniqueDates)
fprintf(ftemp,f_format,datestr(UniqueDates(i,1),'mm/dd/yyyy'),MacroData(i,:));
end
fclose(ftemp);
Thanks a lot, Brian

Accepted Answer

Titus Edelhofer
Titus Edelhofer on 25 Nov 2013
Hi,
a simple solution would be to print first into a string, process the string and then dump to the file, something like
for i = 1:length(UniqueDates)
str = sprintf(f_format,datestr(UniqueDates(i,1),'mm/dd/yyyy'),MacroData(i,:));
str = strrep(str, 'NaN', ' ');
fprintf(f_temp, '%s', str);
end
Titus
  1 Comment
Brian
Brian on 25 Nov 2013
Works perfect thanks Titus. I had never used sprintf before so I really wasn't certain of it's use.
Thanks again, Brian

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