Error when using histogram2: array is wrong shape or size

Gustavo Araújo Rodríguez

2020 4 30

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Hello,

I have the following 1-by-9 vectors representing the bin edges of a bivariate histogram:

DIST_BINS = [0 5 10 20 30 50 100 200 1000];
MAG_BINS = [5.00 5.50 6.00 6.50 7.00 7.50 8.00 8.50 9.00];

I also have a 8-by-8 matrix with the bin counts:

DEAG_MATRIX = [ 0         0         0         0         0         0         0         0;
                0         0         0         0         0         0         0         0;
                0.0594    0.0485    0.0418    0.1706    0.0659    0.0039    0         0;
                0         0         0         0         0         0         0         0;
                0.0016    0.0029    0.0046    0.0250    0.0192    0.0067    0         0;
                0         0         0.0000    0.0006    0.0006    0.0002    0         0;
                0         0         0.0841    0.1712    0.1667    0.0109    0.0464    0.0683;
                0         0         0         0.0001    0.0003    0.0000    0.0005    0.0000];
DEAG_MATRIX = round(DEAG_MATRIX*100)    

When I try to use histogram2, I get the following error:

histogram2('XBinEdges',DIST_BINS,'YBinEdges',MAG_BINS,'BinCounts',DEAG_MATRIX)

Warning: Error creating or updating Quadrilateral
 Error in value of property  ColorData
 Array is wrong shape or size 
Warning: Error creating or updating Quadrilateral
 Error in value of property  ColorData
 Array is wrong shape or size 
Warning: Error creating or updating Quadrilateral
 Error in value of property  ColorData
 Array is wrong shape or size 
 

What am I doing wrong?

My version is MATLAB R2019b

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Gustavo Araújo Rodríguez 2020-4-30

It did not show any plot. However, I think I found the problem. I had created first an axes object and apparently MATLAB was trying to plot the histogram there. I added figure at the beginning and it worked.