3.0.1 release?

[John W. Eaton]

On  3-Apr-2008, David Bateman wrote:

| 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.

Done.

Thanks,

jwe