Re: [Gnuplot-info] Trouble with "binary" option for splot

[<br...@ph...>]

Daniel Geberth wrote:
> Hello all.
> 
> I have trouble getting gnuplot to accept binary data generated via an
> external program. I wrote a C++ routine to output files in the format
> specified by the gnuplot help (topic "binary"), but I always get an error
> message saying "binary file read error: format unknown". 

What version of gnuplot did you try this with?  I ask because binary 
file handling was re-done mostly from scratch between 4.0 and now, so 
there's a chance this broke something.

> I took a look inside the binary.c file in order to understand
> where my error lies, but I think the output format should be correct (ie,
> not end of line characters required). 

It's more than that.  The tricky part is that you must keep your C++ 
stream I/O library from trying to change the representation of line 
endings.  In C, you would use "wb" mode to get this effect.  I'm not 
sure how one would do it in C++, but from a quick look it seems you have 
to set the openmode to binary.

 > I would vastly prefer to not use
> fwrite_matrix, because it generates a huge overhead in terms of files I need
> to include (and find, first of all), 

I can't quite see how one C file and its header can amount to "huge 
overhead"...