I am re-posting this to the spssx-l list. I know nothing about MIXED. Just
based upon the error message, I'd say that you haven't specified that age is
an interval level variable in the syntax and it is trying to allocate space
for each value of age.
-----Original Message-----
From:
[hidden email] [mailto:
[hidden email]]
Sent: Sunday, July 01, 2012 4:01 PM
To:
[hidden email]
Subject: SPSS MIXED Model
Dear ViAnn,
I just wanted to ask you something about the SPSS problem i am trying to
solve.
I have repeated measures of a blood test for each patient (2-15 measurements
per patient) and i want to find out the effect of each independent variables
such as age, gender and ethnicity on the decline of this blood test over
time. Therefore i am trying to run a random intercept and random slope
models on repeated measurements by using MIXED model procedure in SPSS.
However, the program is giving me an error of saying that there is
insufficient memory to estimate model parameters. Totally i have 135823
cases of rows. When i tried to run in a smaller size of cases, the code did
worked. What can i do to solve my problem ? Is it a problem due to computer
memory or SPSS memory ? How can i make the code work ?
My code is something like;
MIXED Blood_test_Value BY Gender Ethnicity WITH Age
/CRITERIA=CIN(95) MXITER(100) MXSTEP(5) SCORING(1)
SINGULAR(0.000000000001) HCONVERGE(0,
ABSOLUTE) LCONVERGE(0, ABSOLUTE) PCONVERGE(0.000001, ABSOLUTE)
/FIXED=Gender Ethnicity Age | SSTYPE(3)
/METHOD=ML
/PRINT=G SOLUTION TESTCOV
/RANDOM= INTERCEPT | SUBJECT(ID) COVTYPE(ID) /REPEATED= Time_point |
SUBJECT(ID) COVTYPE(UNR).
Thank you.
Zalihe.
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