Re: fread : figuring out binary file format

[Quentin Spencer]

Bryan Lepore wrote:
> specifically what does "invalid stream number = -1" mean?

Given your example, I'd say it means you didn't pass it a valid file handle.

> also, i gather that to use fread, this syntax is OK :
>
> octave:5> fread ("28JUL06G.DAT",Inf,"32*single",0,"ieee-be")
>
> ... where "28JUL06G.DAT"  is substituted for "fid" or "f" as i read in 
> `help -i fread"

You have to open and close the file (see help fopen for more 
details--it's very much like in C if you've used file handles in C 
before). The correct way to do this would be:

fid = fopen("28JUL06G.DAT");
data = fread (fid,Inf,"32*single",0,"ieee-be");
fclose(fid);



Quentin