https://communities.sas.com/t5/SAS-Procedures/Proc-mdc/m-p/242964#M55879 <P>Use the DATA step to define an additional variable that is the product of your two continuous variables, and include that in the PROC MDC model statement. &nbsp;This is the usual method for PROC REG. &nbsp;I would suggest centering your continuous variables before carrying this out, in order to keep the design matrix from becoming ill conditioned.</P> <P>&nbsp;</P> <P>Steve Denham</P> Tue, 12 Jan 2016 16:28:49 GMT SteveDenham 2016-01-12T16:28:49Z https://communities.sas.com/t5/SAS-Procedures/Proc-mdc/m-p/242932#M55874 <P>Hi,</P><P>How can I incorporate an interaction between two continous variables in the proc mdc statement?</P><P>Thanks in advance!</P> Tue, 12 Jan 2016 14:32:09 GMT https://communities.sas.com/t5/SAS-Procedures/Proc-mdc/m-p/242932#M55874 PK247 2016-01-12T14:32:09Z https://communities.sas.com/t5/SAS-Procedures/Proc-mdc/m-p/242964#M55879 <P>Use the DATA step to define an additional variable that is the product of your two continuous variables, and include that in the PROC MDC model statement. &nbsp;This is the usual method for PROC REG. &nbsp;I would suggest centering your continuous variables before carrying this out, in order to keep the design matrix from becoming ill conditioned.</P> <P>&nbsp;</P> <P>Steve Denham</P> Tue, 12 Jan 2016 16:28:49 GMT https://communities.sas.com/t5/SAS-Procedures/Proc-mdc/m-p/242964#M55879 SteveDenham 2016-01-12T16:28:49Z