https://community.jmp.com/t5/Discussions/change-the-reference-group-in-a-categorical-variable/m-p/484824#M72893 <P>The reference level is generally the last level. The order is by default alphanumerical. There are a few common exceptions. You can over-ride the order by adding the Value Order column property and defining the order you want to use.</P> Fri, 06 May 2022 16:24:53 GMT Mark_Bailey 2022-05-06T16:24:53Z https://community.jmp.com/t5/Discussions/change-the-reference-group-in-a-categorical-variable/m-p/484803#M72892 <P>How do you change the reference group in a categorical variable in JMP for a regression analysis?</P><P>&nbsp;</P><P>Thank you</P> Sat, 10 Jun 2023 23:48:01 GMT https://community.jmp.com/t5/Discussions/change-the-reference-group-in-a-categorical-variable/m-p/484803#M72892 gav2013 2023-06-10T23:48:01Z https://community.jmp.com/t5/Discussions/change-the-reference-group-in-a-categorical-variable/m-p/484824#M72893 <P>The reference level is generally the last level. The order is by default alphanumerical. There are a few common exceptions. You can over-ride the order by adding the Value Order column property and defining the order you want to use.</P> Fri, 06 May 2022 16:24:53 GMT https://community.jmp.com/t5/Discussions/change-the-reference-group-in-a-categorical-variable/m-p/484824#M72893 Mark_Bailey 2022-05-06T16:24:53Z