topic Re: Find Maximum or Minimum give Quadratic polynomial regression in SAS Procedures https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412410#M67404 <P>Yes, you can use the RSREG routine, which fits a quadratic model and reports the critical values.</P> <P><A href="http://go.documentation.sas.com/?docsetId=statug&amp;docsetTarget=statug_rsreg_gettingstarted01.htm&amp;docsetVersion=14.3&amp;locale=en" target="_self">Documentation and Getting Started&nbsp;example.</A></P> Fri, 10 Nov 2017 16:17:48 GMT Rick_SAS 2017-11-10T16:17:48Z Find Maximum or Minimum give Quadratic polynomial regression https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412240#M67393 <P>&nbsp;</P><P>I made a Quadratic Polynomial linear&nbsp;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?</P> Fri, 10 Nov 2017 08:19:16 GMT https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412240#M67393 Park-KW 2017-11-10T08:19:16Z Re: Find Maximum or Minimum give Quadratic polynomial regression https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412301#M67397 <P>The formula is&nbsp;<SPAN>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.</SPAN></P> Fri, 10 Nov 2017 12:51:37 GMT https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412301#M67397 PaigeMiller 2017-11-10T12:51:37Z Re: Find Maximum or Minimum give Quadratic polynomial regression https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412410#M67404 <P>Yes, you can use the RSREG routine, which fits a quadratic model and reports the critical values.</P> <P><A href="http://go.documentation.sas.com/?docsetId=statug&amp;docsetTarget=statug_rsreg_gettingstarted01.htm&amp;docsetVersion=14.3&amp;locale=en" target="_self">Documentation and Getting Started&nbsp;example.</A></P> Fri, 10 Nov 2017 16:17:48 GMT https://communities.sas.com/t5/SAS-Procedures/Find-Maximum-or-Minimum-give-Quadratic-polynomial-regression/m-p/412410#M67404 Rick_SAS 2017-11-10T16:17:48Z