how to use a simple statement to describe a repeat format output about the function "fprintf"?

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Liang He
Liang He 2012-11-17
编辑： Henry Wolkowicz 2025-4-19
For example, fprintf(fid,'%4.2f %4.2f %4.2f %4.2f %4.2f',data) there are 5 '%4.2f', Can a simple statement like the (5'%4.2') to simplify the output format? I have no idea about it and do not find in the documents of matlab.

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Matt Fig
Matt Fig 2012-11-17
fprintf(fid,repmat('%4.2f',1,5),data)
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Matt Fig
Matt Fig 2012-11-22
编辑：Matt Fig 2012-11-22
C = {'%5.2f ';'%4.3f ';'\n'};
[C{[1 2*ones(1,8) 3]}]
You can build C with as many elements as needed then pass in an index to get the order and number you need.
Henry Wolkowicz
Henry Wolkowicz 2025-4-19
编辑：Henry Wolkowicz 2025-4-19
can one complicate things with
C={'%5.2f & '} for latex table purposes? I keep getting 'number' echos if I try this

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Image Analyst
Image Analyst 2012-11-17
No need to replicate the format string - it will do that automatically. Try it this way:
fprintf(fid,'%4.2f ', data);
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Image Analyst
Image Analyst 2012-11-22
Not sure I understand. That will have every 9th element print with a field width of 5 and the 8 numbers in between print with a field width of 4. Also the printout line will have 9 numbers per row whereas your array has 8 numbers per row. Is that what you want, or not? Because that's what you'd be telling it to do.

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