3.0.1 release?

[David Bateman]

John W. Eaton wrote:
> On 12-Feb-2008, John W. Eaton wrote:
> 
> | Are there any critical patches that should be included or bugs that
> | should be fixed before we make 3.0.1?
> 
> I think most of the reported problems have been fixed, so maybe now
> would be a good time for making a 3.0.1 release.  Any objections?
> 
> Thanks,
> 
> jwe
> 

In the 3.0.1 release candidate "demo plot3" gives the warnings

  Warning: Single isoline (scan) is not enough for a pm3d plot.
           Hint: Missing blank lines in the data file? See 'help pm3d'
and FAQ.

from gnuplot when rotating/zomming with the mouse. I didn't think this
issue was in the 3.0.1 and it has been discussed previously. The problem
is that the "pm3d" flag should not be set for the line objects, but
there was a change introducing "pm3d implicit" in __go_draw_axes__.m.
The reason for this change was that the colorbar doesn't appear for
cases like "contour(peaks); colorbar" due to the fact that the contours
aren't drawn using the palette and gnuplot then automatically decides
that since you didn't use the palette you don't want the colorbar. This
was discussed on

http://www.nabble.com/Re%3A-legend-on-contour-plot-to15390461.html#a15401201

where Petr suggested the use of "set pm3d explicit". Another suggested
fix is to keep "set pm3d implicit" but create a dummy line that uses the
palette outside the range. I prefer the fix where the "set pm3d
implicit" is conditionally not set when there is a single isoline (IE
splot with a single line). The only case this will miss is a contour
with a single contour that I don't consider likely.

This should be applied to both 3.0.x and 3.1.x tress.

D.
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