Re: Saving And Loading Plots in Octave

[John W. Eaton]

On  1-Mar-2012, Jordi Gutiérrez Hermoso wrote:

| I think it would be fairly simple to implement this. The Matlab .fig
| format is simply a .mat file that contains the graphics objects
| necessary to create that graph, and they're just a struct.
| sure if this can be done purely in m-scripts, but I think it should
| just be a simple matter of reading and writing a struct to a .mat file
| which Octave can already do, and then creating a plot from that
| struct, which I don't know if it can be done already or not.

Saving should be fairly straightforward.  I'm not sure that it is
necessary for the hgsave function to use precisely the same
fieldnames.  For example, I supposed "hgS_070000" is some kind of
Matlab figure handle version number encoding, but what meaning does
that have for Octave?

I suppose the hgload function could work recursively and do something
like

  loop over the elements of the structure array (I assume each should
  be a graphics object)
    for each 'type' found
      create the object and set its properties
    for each of the 'children' found
      create the child object and insert it as a child of the current object

I haven't tried it, but I don't see why this can't all be done in a .m
file.

It would be great if someone would like to work on this project.

I know that some people may be tired of me saying this, but if you
want to contribute to Octave, it is essential that you not base your
work in any way on code from Matlab, should you happen to have it
available to you.

jwe