proc mixed

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    Repeated Measures Nested Model in PROC Mixed?

    Hello, I'm looking for help analyzing data. Here's the experimental setup: 12 experimental plots, divided into 3 blocks. Each block is a factorial combination of two treatments (precipitation, nitrogen). Within each plot, I have 3-6 trees of species A and 3-6 trees of species B...
  2. S

    How to get the output using PROC MIXED for residual error to check for normality?

    I am using proc mixed for my analysis (RCBD), but don't know the SAS code for outputting the residual which I can use for checking normality. Can anyone help me with the SAS code? The code I'm using is: proc mixed data=A; class ID trt depth block; model LogNO3= trt| depth; random block...
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    Repeated measures ANOVA w/ time-varying covariate that does not vary across subjects

    Hello community: I am seeking assistance with a repeated measures ANOVA. In this experiment, I examined the return rate of bees to colonies (= dependent variable). These colonies were subjected to one of four food treatments (= categorical predictor variable). The return rate of bees was...
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    Variable labels in Proc Mixed

    I am analysing multiple variables var1 - var10 which have labels. They are named as such so that running a do loop is easy in a Macro. When running Proc GLM it displays both the variable name and the label in the output by default. When running proc mixed only the variable name is displayed. How...
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    Different results from SAS Proc Mixed and SPSS Mixed

    I'm running some analyses where SPSS and SAS are giving me different results (i.e., significant here, but not there). I'm attaching the output. I've mostly fiddled with the SAS syntax to match the SPSS results. I've tried adding the covariates to the class statement, removing the random...
  6. R

    unable to make model Hessian positive definite - help!

    Hello all, My first time posting here, and really hoping that someone can help me out! I have data from a repeated measures experiment in which the time points were not evenly spaced + some missing data from individual animals, so I am using proc mixed and attempting to find the appropriate...
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    PROC MIXED - To analyze cluster randomized trial

    Hi All, I have a query regarding how to analyze a cluster randomized trial. in the trial, even though the unit of randomization is the cluster, unit of analysis is the patient. The study had clinics that were randomized as either intervention or no intervention. so patients in intevention...
  8. B

    repeated measures subject with n>1?

    I am analyzing a repeated-measures dataset in SAS using proc mixed, and I'm stumped about the repeated measures subject. Here's the design of the experiment: I have forest plots, each containing 100 trees, and randomly assigned to contain 1, 2, 4, or 8 different genetic clones per plot...
  9. S

    DF in Repeated Measures ANOVA

    Hi all! :wave: In advance: thank you to all those who take the time to even read this post, as well as answer it: Additional to my sunfish study (I talked about in previous posts) I am also conducting a restoration project dealing with treatment and control sites over multiple years. I...