https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52429#M14415 I'm trying to do a non-linear analysis of covariance (ancova) and can't figure out how to do it with SAS or if it's even possible. Can anyone help me with this issue?<BR /> <BR /> Specifically, I'm trying to test if the difference between multiple non-linear curves is statistically significant. The non-linear curves are in the form of y=aX^b. Additionally, I would also like to test the significance of multiple Explanatory variables on the response variable. <BR /> <BR /> Thanks for any help! Thu, 04 Feb 2010 16:12:53 GMT Currie 2010-02-04T16:12:53Z https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52429#M14415 I'm trying to do a non-linear analysis of covariance (ancova) and can't figure out how to do it with SAS or if it's even possible. Can anyone help me with this issue?<BR /> <BR /> Specifically, I'm trying to test if the difference between multiple non-linear curves is statistically significant. The non-linear curves are in the form of y=aX^b. Additionally, I would also like to test the significance of multiple Explanatory variables on the response variable. <BR /> <BR /> Thanks for any help! Thu, 04 Feb 2010 16:12:53 GMT https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52429#M14415 Currie 2010-02-04T16:12:53Z https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52430#M14416 Seems like you want to look at the NLIN or NLMIXED procedures. Thu, 04 Feb 2010 16:50:58 GMT https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52430#M14416 Doc_Duke 2010-02-04T16:50:58Z https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52431#M14417 Thanks, do you know of any online resources or manuals that work through something similar? Thu, 04 Feb 2010 22:33:02 GMT https://communities.sas.com/t5/SAS-Procedures/Nonlinear-ANCOVA/m-p/52431#M14417 Currie 2010-02-04T22:33:02Z