change the colormap of a figure using another GUI

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mahmoud zemzami
mahmoud zemzami 2020-5-20
评论： mahmoud zemzami 2020-5-29
Hi,
I created a figure with pcolor map, and then I created a gui called figure prperties that let change the properties of the pcolor map like grid on/or off, color, line width.
the problem is that when use
colormap summer
or any other colormap (coper, winter, hot...)
the figure doesn't change, and it sems that the code in the GUI is not linked to the figure that I already created.
  2 个评论
KostasK
KostasK 2020-5-20
Can you show us part of your code where you have the colormap summer included?
mahmoud zemzami
mahmoud zemzami 2020-5-20
I created a GUI that create a figure with pcolor. Then I created another GUI in which I can change the properties of the figure.
Figure
the code that that creat the figure:
figure
carte=pcolor(map_longitude,map_latitude,precipitation_change)
hold on
h = colorbar;
h.Label.String = 'Change in Precipitation (in %)';
colormap
The code in the GUI that costumize the pcolor figure is
%grid on/off this is for a popup menu and it work perfectly
grid=get(handles.Grid,'Value');
if gridcolor ==1
set(carte, 'EdgeColor', 'black');
elseif gridcolor ==2
set(carte, 'EdgeColor', 'none');
end
% change color of the figure. this code is for a menu and it
% doens't work (nothing change in the plot)
colour=get(handles.colours,'Value');
if colour==1
colormap summer
elseif colour==2
colormap winter
elseif colour==3
colormap spring
end

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采纳的回答

Ameer Hamza
Ameer Hamza 2020-5-20
If multiple figures exist, running colormap without specifying which figure you are referring to can lead to such issues. Explicitly pass the handle of figure or axes. For example in your first code, get the handle of the axes object
fig = figure;
ax = axes(); % get handle of axes object
carte=pcolor(map_longitude,map_latitude,precipitation_change)
hold on
h = colorbar;
h.Label.String = 'Change in Precipitation (in %)';
colormap
Now pass the handle 'ax' to explicitly specify which axes are you referring to
if colour==1
colormap(ax, 'summer');
elseif colour==2
colormap(ax, 'winter');
elseif colour==3
colormap(ax, 'spring');
end

更多回答（1 个）

Rik
Rik 2020-5-20
编辑：Rik 2020-5-20
Whenever you are working with a GUI: use explicit handles. Many functions accept handles to the affected object as an input, colormap is no exception.
Make sure your GUI has access to the handle of the axes object you want to modify.
For other advice about GUI design (and reasons why you should not start with GUIDE, as I'm seeing at the edge of your screenshot), see this thread.
colours=get(handles.colours,'String');
if get(handles.colours,'Value')>1 %skip '------'
colour=colours{get(handles.colours,'Value')};
end
colormap(ax,colour)
  4 个评论
显示 2更早的评论
mahmoud zemzami
mahmoud zemzami 2020-5-21
Ahh now I understand. Thank you so much for your precious help.
Rik
Rik 2020-5-21
You're welcome. If you feel either answer solved your question, please consider marking it as accepted answer. If you think the other was helpful as well you can expres that with the upvote button.

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