Dear SPM community,
is there a way to include subjects in longitudinal analyses that lack scans compared to the rest (but have at least one)? As far as I know, the standard SPM GLM cannot do this due to the structure of the covariance matrix, which assumes the same number of scans for all subjects.
So far, I only found AFNIs 3dLME (https://afni.nimh.nih.gov/pub/dist/doc/program_help/3dLME.html) but I was wondering whether there are SPM extensions / toolboxes that can do this (at least I didn't find any on the official SPM page).
Thanks in advance and best regards,
Manfred
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