MATLAB: How to plot two colorbars in isosurface figure

colorbarisosurface

I want to plot two isosurface in one figure :Z1,Z2

 isovalues1 = 0:0.1:1;
 for i=1:length(isovalues1)
 isosurface(X,Y,Z,Z1,isovalues1(i));
 end
 hc(1,1)=colorbar;
 hc(1,1).Limits = [0 1];
 hold on
 ax = gca;
 isovalues2 = 40:10:100;
 for i=1:length(isovalues2)
   isosurface(X,Y,Z,Z2,isovalues2(i));
 end
 hc(1,2)=colorbar;
 hc(1,2).Limits = [40 100];

I don't know why this does not work properly. colorbar ranges are [0 1], [40 100] but they shows only one colorbar limits [0 100] How can I fix it?

Best Answer

You need to hold after the first isosurface for each axes

Each axes can have only one colorbar

Related Solutions

MATLAB: How to create a colorbar that only uses a portion of the colormap in MATLAB 7.0 (R14)

The colorbar object is a specialized form of the axes object. As such, it has the same properties as any axes objects, including limits on how much of the axes are shown. The following example code generates two surface plots, assigns them to different parts of the colormap, makes two separate colorbars, and restricts the Y axis on each colorbar as necessary.

%set up data, make two plots
ah(1) = subplot(2,1,1)
[x, y, z] = peaks;
s(1) = surf(x,y,z);
ah(2) = subplot(2,1,2)
z2 = z + max(z(:));
s(2) = surf(x,y,z2);
%set the colormap limits for the axes
set(ah,'CLim', [min(z(:)) max(z2(:))])
%make colorbars
subplot(2,1,1)
cbar(1) = colorbar;
subplot(2,1,2)
cbar(2) = colorbar;
%restrict colorbar axes limits
set(cbar(1),'YLim',[min(z(:)) max(z(:))]);
set(cbar(2),'YLim',[min(z2(:)) max(z2(:))]);

The labels displayed next to the colorbars can be changed by setting the "YTickLabel" property, in the same manner as the "YLim" property.

MATLAB: How to plot two isosurfaces in one figure

Nayoung,

It looks like there are 3 issues here:

1. Plotting two surfaces on the same axes

You are explicitly asking for a second set of axes with

ax(2)=axes;

Remove that line, add

hold on;

and fix the reference to ax(2):

    set(ax(1), 'XAxisLocation','top',...
               'YAxisLocation','right',...
               'Color','none');

Hold on prevents plot functions from removing existing graphics from an axes. You should probably be using it inside your for-loops.

See Walter's answer to your previous question.

2. Using two colorbars on the same axes

Two colorbars is not supported. You may be able to define individual color maps for your surfaces to help you differentiate them.

There is a lot of good information here, along with example code: How do I use multiple colormaps in a single figure?

3. Finding a cross-section of two surfaces

To find a cross-section or intersection you would need to do some additional math (solve for the thing you want to see) and then plot that data. I am not aware of any 'cross section viewing' tools built in to Matlab's plotting engine.

I lied, I thought of a 4th thing:

4. isosurface in a loop?

This may be what you are intending to do, as I do not understand what your data/variables are modeling and what you are trying to visualize. Realize that you are plotting a surface for each value of both isovalues1 and isovalues2, which means 16 surfaces total, not the two you described in the question title.

Best Answer

Related Solutions

MATLAB: How to create a colorbar that only uses a portion of the colormap in MATLAB 7.0 (R14)

MATLAB: How to plot two isosurfaces in one figure

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