From: Khanh on
If I have an excel file such as:
A B C
1 1 14
1 2 43
1 3 24
2 1 25
2 2 87
2 3 3
3 1 23
3 2 34
3 3 7

How can I make a contour plot of A, B, and C? I tried different methods that I found online but doesn't work. Please show me a simple way to do this.