topic Group of Reference coeff in EM Logistic Regression, please help! Thank you in SAS Data Science https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216478#M3124 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #0000ff;">Hi All,</SPAN></P><P><BR /><SPAN style="color: #0000ff;">I have built a Logistic Regression model in EM and I had a quick question regarding the reference group.</SPAN></P><P><SPAN style="color: #0000ff;">The reference group variable isn’t set to a coefficient of zero in EM, it seems to be the negative sum of the other coefficients in the variable.</SPAN></P><P></P><P><SPAN style="color: #0000ff;">Could you please let me know why? I would expect the reference group to have a coefficient = 0.</SPAN></P><P></P><P><SPAN style="color: #0000ff;">Your help would be much appreciated.</SPAN></P><P></P><P><SPAN style="color: #0000ff;">Thank You</SPAN></P></BODY></HTML> Mon, 18 May 2015 12:36:11 GMT Kanyange 2015-05-18T12:36:11Z Group of Reference coeff in EM Logistic Regression, please help! Thank you https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216478#M3124 <HTML><HEAD></HEAD><BODY><P><SPAN style="color: #0000ff;">Hi All,</SPAN></P><P><BR /><SPAN style="color: #0000ff;">I have built a Logistic Regression model in EM and I had a quick question regarding the reference group.</SPAN></P><P><SPAN style="color: #0000ff;">The reference group variable isn’t set to a coefficient of zero in EM, it seems to be the negative sum of the other coefficients in the variable.</SPAN></P><P></P><P><SPAN style="color: #0000ff;">Could you please let me know why? I would expect the reference group to have a coefficient = 0.</SPAN></P><P></P><P><SPAN style="color: #0000ff;">Your help would be much appreciated.</SPAN></P><P></P><P><SPAN style="color: #0000ff;">Thank You</SPAN></P></BODY></HTML> Mon, 18 May 2015 12:36:11 GMT https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216478#M3124 Kanyange 2015-05-18T12:36:11Z Re: Group of Reference coeff in EM Logistic Regression, please help! Thank you https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216479#M3125 <HTML><HEAD></HEAD><BODY><P>If you are using the Regression node, you can change the <STRONG>Input Coding</STRONG> property (under Model Options) to <STRONG>GLM</STRONG> to get the coding that you would like for class inputs.</P></BODY></HTML> Mon, 18 May 2015 13:52:34 GMT https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216479#M3125 WendyCzika 2015-05-18T13:52:34Z Re: Group of Reference coeff in EM Logistic Regression, please help! Thank you https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216480#M3126 <HTML><HEAD></HEAD><BODY><P>Thank you Wendy!</P></BODY></HTML> Mon, 18 May 2015 21:05:57 GMT https://communities.sas.com/t5/SAS-Data-Science/Group-of-Reference-coeff-in-EM-Logistic-Regression-please-help/m-p/216480#M3126 Kanyange 2015-05-18T21:05:57Z