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

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.

Answer 1

[Matt Fig]

fprintf(fid,repmat('%4.2f',1,5),data)

[Liang He]

This is a good method,but it can not solve the problem when the format is complex. For example, when the data is 28*10000.I should save the data in the next format fprintf(fid,'%5.2 %4.2f %4.2f %4.2f %4.2f %4.2f %4.2f %4.2f %4.2f\n') In the format,there are 8 repeat %4.2 ,but other are different.So,I am wondering are there a method to simplify the repeat part.

[Matt Fig]

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]

can one complicate things with

C={'%5.2f & '} for latex table purposes? I keep getting 'number' echos if I try this

Answer 2

[Image Analyst]

No need to replicate the format string - it will do that automatically. Try it this way:

fprintf(fid,'%4.2f ', data);

[Liang He]

This is a good method,but it can not solve the problem when the format is complex. For example, when the data is 28*10000.I should save the data in the next format fprintf(fid,'%5.2 %4.2f %4.2f %4.2f %4.2f %4.2f %4.2f %4.2f %4.2f\n') In the format,there are 8 repeat %4.2 ,but other are different.So,I am wondering are there a method to simplify the repeat part.

[Image Analyst]

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.

[Liang He]

Thank you for your answer, the Matt Fig has solved it.