Number of leading zeroes as a variable

12 views (last 30 days)
James
James on 24 Oct 2016
Answered: Honglei Chen on 24 Oct 2016
I know that to print out a number with a certain amount of leading zeroes, you are supposed to use %0X, where X is the number of digits you want in your output. For example, sprintf('%06g',13) gives you the string '000013' as output. Is there a way to make the formatting value a variable? Something along the lines of
function x=leadzero(y,z)
x=sprintf('%0y',z)
end
I know it can be done with a for loop, but is there are way to implement this directly into the sprintf command?

Accepted Answer

dpb
dpb on 24 Oct 2016
Fer shure, just write the format string desired dynamically--
function s=leadzero(Nz,z)
fmt=num2str(Nz,'%%0%dg');
s=sprintf(fmt,z)
end
Nz for "Number zeros" seemed a better variable name than y as did an s for a returned string output variable...the format string expression can be wrapped inside the sprintf call, of course, just wrote it out for clarity here.

More Answers (1)

Honglei Chen
Honglei Chen on 24 Oct 2016
y = 6;
z = 13;
sprintf(['%0' num2str(y) 'g'],z)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!