Posted by
Ryan on
Aug 17, 2017; 12:39am
URL: http://spssx-discussion.165.s1.nabble.com/Runing-contrast-tests-in-a-2x2x2-tp5734662p5734667.html
This issue has been discussed quite a bit in the past. You might consider searching the SPSS-L archives.
To make sure sure the coefficient matrix L is estimable, my general recommendation is to start by writing out the linear combinations to estimate cell means, and then to use those linear combinations to construct the contrasts of interest.
While I agree with Bruce that the EMMEANS statement is a simpler alternative, using the coefficient matrix L is very useful for educational purposes and constructing certain complex contrasts. If you are interested in learning more about this topic, write back with the current LMATRIX code you wrote, and time permitting we will help you arrive at estimable statements.
Ryan
Sent from my iPhone
> On Aug 16, 2017, at 3:12 PM, itwardus <
[hidden email]> wrote:
>
> I am having some serious difficulty with getting my contrast test to run in
> my 2x2x2 ANCOVA. However I keep getting this error: This L matrix is not
> estimable. Hypothesis tests cannot be computed.
>
>
> I have tried to run both a Special Contrast and a LMatrix. Could someone
> help me set up the syntax that I would need to test between two conditions
> for DV1 by A B C WITH CV1?
>
> Thanks in advance.
>
>
>
> --
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http://spssx-discussion.1045642.n5.nabble.com/Runing-contrast-tests-in-a-2x2x2-tp5734662.html> Sent from the SPSSX Discussion mailing list archive at Nabble.com.
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