[VoxBo] Adding derivativesin GDW error

[Rob Blumenfeld]

Hey Voxbo group,

  I am getting an error when I try to add derivatives to my GLM in the
G-Design Widget. After selecting the covariates of interest that I want to
add a derivative to, I click modify selection-->derivative(s) and then I
receive the message that the number of observations must be an even number.
Indeed, my study has an odd number of timepoints (1575). I get this message
regardless of whether I selected one covariate or multiple covariates. My
question is: Is this an error or there some reason why I can not add
derivatives into to a study that has an odd number of timepoints? Any help
would be greatly appreciated.

Thanks for your time,

-Rob

 

Rob Blumenfeld

Dynamic Memory Lab

UC Davis Psychology & Center for Neuroscience

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.voxbo.org/pipermail/voxbo-general/attachments/20070323/6e075c44/attachment.html