How do I format and write a numeric array to a file as text?

What's the easies way to write an array to a formatted file. If I have 16 columns, it seems cumbersome that I have to specify the individual format for each column and then print it in a for loop. Isn't there something like this?

Arrayprint(fid,Data,'f10.5')

thanks

Answer 1

[Jan]

DLMWRITE can create such files. But FPRINTF is vectorized also, so you do not need a loop:

x = rand(100, 16);
fmt = [repmat('%10.5f ', 1, 15), '%10.5f\n'];
fid = fopen(FileName, 'w');
fprintf(fid, fmt, x');  % transposed!
fclose(fid);

Answer 2

[Brian]

I don't see where DLMWRITE can determine that I have 16 columns and automatically insert a '\n' but I'll keep looking into it. In the meantime, your approach works great and I'll simply do that. Perhaps using the "size" command along with "repmat" I can come up with something. thanks very much!

Answer 3

[Brian]

I found that DLMWRITE works exactly like I want it to.

dlmwrite(FileName,output,'precision',5,'delimiter',' ')

thanks again for the information. I was unaware of that command.