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ArmandoTasistro
Obsidian | Level 7

What SAS Procedure can I use to analyze data like shown in the graph. The dependent variable initially responds to the independent one, but after a certain value it does not. How can I determine the statistical relationship between y and x in the response zone, the value of x after which y does not respond to x, and the y value in the no change zone?

1 ACCEPTED SOLUTION

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PaigeMiller
Diamond | Level 26

It should be relatively easy to modify PROC NLIN code to use a straight line. The example fits your problem perfectly once this modification is made.

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Paige Miller

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4 REPLIES 4
ArmandoTasistro
Obsidian | Level 7

Thank you Paige, but that example is for a quadratic-plateau response, and I am interested in a linear-plateau one, i.e. two straight lines.

Armando

PaigeMiller
Diamond | Level 26

It should be relatively easy to modify PROC NLIN code to use a straight line. The example fits your problem perfectly once this modification is made.

--
Paige Miller
ArmandoTasistro
Obsidian | Level 7

Thank you, Paige!

Armando

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