topic Dummy coding in SAS Programming https://communities.sas.com/t5/SAS-Programming/Dummy-coding/m-p/78436#M256441 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am trying to get SAS to print out its dummy coding structure using proc glm, because I am assuming it's using the last categorical variable as the reference variable with 0 0 0 (I have 3 treatment groups) and additionally, how would I change it so instead of 0s for the reference variable I have -1s?</P><P></P><P>Thanks!!</P><P>Sabina</P></BODY></HTML> Thu, 27 Sep 2012 02:35:17 GMT libragirl9 2012-09-27T02:35:17Z Dummy coding https://communities.sas.com/t5/SAS-Programming/Dummy-coding/m-p/78436#M256441 <HTML><HEAD></HEAD><BODY><P>Hi,</P><P></P><P>I am trying to get SAS to print out its dummy coding structure using proc glm, because I am assuming it's using the last categorical variable as the reference variable with 0 0 0 (I have 3 treatment groups) and additionally, how would I change it so instead of 0s for the reference variable I have -1s?</P><P></P><P>Thanks!!</P><P>Sabina</P></BODY></HTML> Thu, 27 Sep 2012 02:35:17 GMT https://communities.sas.com/t5/SAS-Programming/Dummy-coding/m-p/78436#M256441 libragirl9 2012-09-27T02:35:17Z Re: Dummy coding https://communities.sas.com/t5/SAS-Programming/Dummy-coding/m-p/78437#M256442 <HTML><HEAD></HEAD><BODY><P>You can obtain the dummy variable coding from PROC GLMMOD.</P><P></P><P>You can't change the dummy variable coding used by PROC GLM, however if you want a level to be -1 and another level to be +1, you can achieve this via the CONTRAST statement of PROC GLM.</P></BODY></HTML> Thu, 27 Sep 2012 14:19:34 GMT https://communities.sas.com/t5/SAS-Programming/Dummy-coding/m-p/78437#M256442 PaigeMiller 2012-09-27T14:19:34Z