writing a large array to disk

writing a large array to disk

[Karthik Vishwanath]

Hello,

I have a (fairly) large 4-d array in my program that I want to dump to
disk as text data (so that it may be suitably parsed later). I was
wondering if there was an easy (hopefully, single library call!) that
would do this?

If there is none, and I must write the data out "by hand", what would be
the most optimal way of doing this? 

Thanks,

-K

Re: writing a large array to disk

[Glynn Clements]

Karthik Vishwanath wrote:

> I have a (fairly) large 4-d array in my program that I want to dump to
> disk as text data (so that it may be suitably parsed later). I was
> wondering if there was an easy (hopefully, single library call!) that
> would do this?

No.

> If there is none, and I must write the data out "by hand", what would be
> the most optimal way of doing this? 

Nested "for" loops:

	double data[NI][NJ][NK][NL];
	FILE *fp = ...;
	...
	fprintf(fp, "%f %f %f %f\n", NI, NJ, NK, NL);
	for (i = 0; i < NI; i++)
	    for (j = 0; j < NJ; j++)
	        for (k = 0; k < NK; k++)
	            for (l = 0; l < NL; l++)
	                fprintf(fp, "%f\n", data[i][j][k][l]);

-- 
Glynn Clements <glynn.clements@virgin.net>