Jtte posted on Thursday, February 19, 2009 - 1:14 pm
Have been trying to use the rawSAT2.mx script as posted on your website for calculation of saturated statistics and test assumptions with twins (sex limitation model).
I have modified the script slightly in that I have reduced the number of zygosity groups from 6 to 5 but otherwise it is similar.
Have run into a problem in that the script will not run. Error message tells me that the variance of some of the variables (sex variables for twin 1 and twin 2 within each zygosity group) are zero. This is what I would have expected as the groups represent zygosity/ sex groups and must therefore have been the same in the example shown on the website.
I'm using version 5.0 and I think the website example is run on version 5.2
Any thoughts you have on what might be happening would be appreciated.