Lin Gu posted on Sunday, December 09, 2012 - 6:43 pm
I have a variable that has 7 ordered values: 0, .5, 1, 1.5, 2, 2.5, and 3. I put it one the categorical list and got the error message about non-integar values. Is there a way that I can treat the variable as a categorical variable or do I have to model it as a continuous variable? Thanks.
*** ERROR in VARIABLE command Categorical variable U20 contains invalid and/or non-integer values. Problem with: GPCM
I see this error trying to run an IRT model in mplus. I am employing the users guide example "5.5: Generalized partial credit model". I am copying/downloading the example input and data files as is. The file will run if I drop (gpcm) out of the command line in the example. But I am wanting to run the gpcm.