Contour plot of quadratic regression model

[chowfar]

Hi, I want to know how can I get a contour plot of quadratic regression model in SAS 9.4. The proc glm does not give the contour plot automatically. Please help.

[PGStats]

If you don't have any CLASS effect in your model, you could possibly get contour plots with proc RSREG.

[chowfar]

Thanks for the reply. Can you please give an example? I mean sample SAS code with proc rsreg

[PGStats]

Example 85.1, in my version of the documentation, produces a contour plot.

[chowfar]

How can I get  three-dimensional surface plots of quadratic regression model in SAS?

model yield = t pr t2 pr2 tp;

where t= temperature ( values scaled to -1,0 and 1)

pr= pressure  ( values scaled to -1,0 and 1)

t2= t*t

pr2=pr*pr

tp=t*pr;

[gergely_batho]

You can save predictions of the model, then use proc g3d (and proc g3grid if needed).

[Rick_SAS]

As PGStats said, look at the doc for PROC RSREG. The Getting Started example looks similar to what you need.

This (untested) code might point you in the right direction:

proc rsreg data=Have plots(unpack)=surface(3d);

model yield = temperature pressure;

run;

Notice that the procedure automatically fits a quadratic model, so you do not need to specify the quadratic terms for temperature^2, pressure^2 or temperature*pressure.