How to make a Contour Map

Hello,

I am still quite new to MATLAB, and I need to produce a contour map from a data set of x,y,z which represent longitude, latitude, and elevation of a surface.

I have not been able to use the contour function to get an image which makes sense. MATLAB tells me that my Z matrix must be 2x2 at least, which in the case of my data makes no sense.

The data is as follows:

X=[-0.343,-0.338,-0.333,-0.331,-0.3275,-0.3215,-0.315,-0.305,-0.293,-0.327,-0.3225,-0.3175,-0.315]';

Y=[0.461,0.463,0.463,0.4665,0.4675,0.4725,0.4725,0.4775,0.4815,0.4825,0.48,0.4775,0.4725]';

Z=[630,535,520,610,630,610,710,620,690,630,610,610,710]';

Any help with making a contour map would be greatly appreciated.

Answer 1

[John D'Errico]

You have scattered data. Contour requires GRIDDED data.

Download tricontour from the file exchange. I recall there are two versions up there. Either will be fine.