Re: Plotting in Guile

[Hans Aberg]

On 28 Jul 2010, at 17:21, Joel James Adamson wrote:

> I am using Guile to iterate equations and produce trajectories from
> those iterations.  My current strategy is to redirect the stdout to a
> file and then use GNUPLOT to plot the trajectories as parametric
> plots.  However, I would like to contain everything within one  
> program,
> to keep Makefiles simple and (ideally) only deal with one programming
> language for the project.

GNUPLOT seems to require pipes, if not using a file.

> 2. My thoughts were that I could use the POSIX IPC modules available  
> in
> Guile to run GNUPLOT and send commands through a pipe or other
> appropriate interface.

Guile has a command scm_pipe() (see manual). It is not difficult to  
link to C-code - that is a point of using Guile.

You might also define a new type, which i Guile is called a SMOB  
(small object). Again, this is not difficult to do.

  Hans