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Park-KW
Calcite | Level 5

 

I made a Quadratic Polynomial linear regression. and I want find out the maximum or minimum value of quadratic polynomial linear regression. Are there any procedure to find out max or min value?

2 REPLIES 2
PaigeMiller
Diamond | Level 26

The formula is x = -b / 2a, where b is the coefficient of the linear part, and a is the coefficient of the quadratic part. So you can program this in a data step in about 30 seconds. I don't know of any built-in way in SAS to find this value.

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Paige Miller
Rick_SAS
SAS Super FREQ

Yes, you can use the RSREG routine, which fits a quadratic model and reports the critical values.

Documentation and Getting Started example.

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