PCOLOR appearance/shading changes when PLOT items are on the same axes!?

2011 9 2
1 个回答
回答已采纳
7 次查看（30 天）

0 个投票

Hi,
This one is really baffling me. I am plotting a regularly gridded bathymetry dataset using pcolor and then overplotting markers where I have sampled oceanographic data using the plot command as follows:
h=pcolor(lon,lat,depth);
set(h,'linestyle','none');
shading interp;
hold;
h1=plot(lon_CTD,lat_CTD,'kd','markeredgecolor','w','markerfacecolor','k','markersize',4);
The above works fine, but if I remove the markers either using the plot editor of delete(h1), the shading/style of the pcolor image becomes messy and distorted. If I add the markers again it returns to looking corectly shaded. It is almost as if when the plot objects are removed, the shading becomes part "flat" and part "interp"! I odnt understand why the appearance of the pcolor object changes at all.
Many thanks Ziggy

请先登录，再回答此问题。

 采纳的回答

Walter Roberson
Walter Roberson 2011-9-2

0 个投票

Less than a day ago, someone had a similar problem that was solved for them by switching
set(gcf, 'renderer', 'zbuffer')

3 个评论
显示 1更早的评论 隐藏 1更早的评论

Dziga Walker
Dziga Walker 2011-9-4
Thanks, that does work. It begs the question, "Do different plotting/graphics commands switch the renderer property or does the renderer stay as the default unless manually changed as directed by your answer?" The Painters (vector) seems to be the default renderer for my figures. I prefer to export figures as vector files, unless there is alot of filled contours/pcolor or surface objects in which case I tend to chose a raster rendered format, but I thought this was just for exporting and not related to the image drawn on the screen.
Anyway thanks again your answer has solved my problem.
Walter Roberson
Walter Roberson 2011-9-4
Normally, the Renderer changes automatically. (This is especially the case if you invoke something with transparency as only OpenGL handles transparency.)
Dziga Walker
Dziga Walker 2011-9-5
Thanks again Walter. Such things are really interesting to know especially when trying to get my all important figures exported in a form suitable for publication without losing any quality/information.

请先登录，再进行评论。

更多回答（0 个）

类别

在 帮助中心 和 File Exchange 中查找有关 Lighting, Transparency, and Shading 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by