MATLAB绘图平面方程

Question

I have the following plane equation Yhat = 1.2 + 2.1*A + 3.1*B extracted from a multiple linear regression model with two continuous predictors variables A and B, and the predicted variable Yhat. All variables are continuous and have values between 1 and 10.

How can I plot this plane equation?

Answer 1

Easy.

Create A and B in the required range using meshgrid

[A,B]=meshgrid(1:10,1:10);

evaluate the equation

Yhat = 1.2 + 2.1.*A + 3.1.*B;

and use the surf function

surf(A,B,Yhat)