contour matrix empty in contourf

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Yu Li 2018-11-21

评论： Walter Roberson 2018-11-22

Hi:

I have a X,Y,Z matrix, and use command [xc,yc]=contourf(new_X,new_Y,new_Z); to plot a contour plot.

The xc is empty, but it can be seen in 'new_Z', it is not empty and have a wide range of variation.

is there any problem with my operation?

Thanks!

Yu Li 2018-11-22

Hi Walter:

Thanks for your reply.

could you please explain what do you mean by 'ask for at least 15 contour intervals'?

Thanks!

Walter Roberson 2018-11-22

NumLevels = 15;
[M, c] = contourf(new_X, new_Y, new_Z, NumLevels);

My tests with your data shows that c comes out empty if the number of levels is 14 or less (default is 10.)

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