Re: exporting arrays to C

[Bill Denney]

On Wed, 10 May 2006, NZG wrote:

> I've got an 8k array of data in Octave that I need to export as a C 
> matrix to make a lookup table. Currently I'm using "save" in conjunction 
> with a normal text editor "replace" to add commas and brackets. This 
> works ok, but doesn't break the array into multiple lines, it's just one 
> huge line, which is harder to break with a "replace".
>
> What's the least painful way to do this?

It depends exactly what you want to do.  If you want to keep exporting it 
as a text file and just make the exporting easier (i.e. not opening it 
with a text editor), you can look into either csvwrite or dlmwrite (both 
in octave-forge.

If those don't do what you're wanting, you can try something like

matrix = 1:10;
filename = "myfile.txt";

fid = fopen (filename);
fprintf (fid, "%g," matrix);
fprintf (fid, "\n");
fclose (fid);

(I didn't actually test the code, but something similar should work.)

There are other methods of writing to files and you can also directly link 
your C code to octave (other people are more expert in that, so they 
would be better to ask about it).

Bill

--
The decision doesn't have to be logical, it is unanimous.
  -- unknown