two bugs in one (rgb2color & bug_report)

[Ben Abbott]

The bug_report function failed for me today (I think this has already  
been reported, but if not ... )

The bug I wanted to report was ...

--------------------
octave:6> h = plot (1:10)
octave:7> set (h, "color", rgb2gray (get (h, "color")))
error: invalid value for color property "color"
--------------------

However, the following command works.

--------------------
octave:8> set (h, "color", mean (get (h, "color"), 2) * [1 1 1])
--------------------

Digging a bit more

--------------------
octave:9> rgb = get (h, "color"); whos rgb
Variables in the current scope:

   Attr Name        Size                     Bytes  Class
   ==== ====        ====                     =====  =====
        rgb         1x3                         24  double

Total is 3 elements using 24 bytes

octave:10> gray = rgb2gray (get (h, "color")); whos gray
Variables in the current scope:

   Attr Name        Size                     Bytes  Class
   ==== ====        ====                     =====  =====
        gray        1x3                         24  double

Total is 3 elements using 24 bytes

octave:11> gray
gray =

     0.33333    0.33333    0.33333
--------------------

I'm at a loss to see why the 1x3 double from rgb2gray is an invalid  
color value.

When I tried bug_report ...

--------------------
bug_report
Please enter a one-line description of your bug report.

Subject: rgb2color produces an invalid color value
sh: octave-bug-3.1.55: command not found
--------------------

John/Jaroslav,

If it is not already too late, should the bug_report problem be  
resolved prior to the 3.2 release.

Ben