Dear experts,

Thanks a lot for your great software.

I have conducted linear regressions with SDM and it really did a great job. Now I am considering to do some non-linear regression with SDM. For example,  I want to fit a gamma function curve to the data. Can I use SDM to achieve that? If not, is it possible to export the data to a generally readable format,  and run the regression with other software (such as Matlab or R)?

Any help will be appreciated.

Guochun

Dear Guochun, 

Unfortunately, SDM only conducts linear regressions. In order to be able to fit a non-linear regression you should do all the steps made in SDM to create the imputations, which is extremely hard and long. 

Sorry for not be able to help, 
Kind regards, 
Lydia

Hi Lydia,

Thanks a lot for your reply.

I have been able to run a non-linear regression by adding the quadratic of the linear predictor into the regression model in SDM, and it appears to have done a good job, since I plotted the results and the predicted values could largely fit the trend. Does this kind of analysis make sense? If so, I may consider adding a cubic term to fit more complex curves.

Best,
Guochun