Heatmap and Contour figures in Matlab

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Jack 2014-7-21

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评论： Jack 2014-7-24

Suppose that I have this information that first column is feature one of a motor, Second column is feature two and column three is response (in this case performance of motor).

I want have something like heatmap or contour that for example I have a warmer (for instance red color) for first row in matrix and more light color for row two and etc. What should I do?

Thanks.

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Answer 1

Arun Mathew Iype 2014-7-22

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The 3D bar should be ideal for this. Please have a look at the sample below.

data =[34 56 100;
12 12 80 ;
7 6 60;
3 4 20;
1 1 10.5;
0 0 1];
figure;
%flipping the data to get a better view

h = bar3(flip(data',2));
colorbar;

You can also explore contour and pcolor for advanced options in the below links. There are examples provided there. http://www.mathworks.com/help/matlab/ref/pcolor.html http://www.mathworks.com/help/matlab/ref/contour.html

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Arun Mathew Iype 2014-7-22

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Heres a sample code:

% flip data in order to get proper plot using pcolor
data1 = flip(data,1)
% inserting values as pcolor ignores last row and column
data1(7,:) =[0 0 0]
data1(:,4) =[0 0 0 0 0 0 0]
%plotting using pcolor
pcolor(data1)
% inserting the color bar
colorbar;

Please "accept" the answer if its helpful

Jack 2014-7-24

I think there is a problem in your charts. For example in bar3 I want have column 1 values as X, Column 2 values as Y and column 3 values as Z, but here you only plot 18 values separately.

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