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st: Grand mean
From
Debs Majumdar <[email protected]>
To
[email protected]
Subject
st: Grand mean
Date
Mon, 14 Mar 2011 17:04:42 -0700 (PDT)
Hello Statalisters,
I have a longitudinal dataset with around 500 people and 4 time points which
looks like the following:
id vis roi reg mean
101 1 Frontal B 1.179829 |
101 1 Temp L 1.155491 |
101 1 Angular R 1.25507 |
101 1 Temp R 1.155153 |
101 1 Post B 1.351274 |
101 1 Angular L 1.221858 |
-------------------------------------------------|
101 2 Frontal B 1.129451 |
101 2 Temp R 1.139536 |
101 2 Angular R 1.206856 |
101 2 Post B 1.33327 |
101 2 Temp L 1.085078 |
101 2 Angular L 1.164232 |
.........
.......
.....
I want to create a grand mean for each participant at each of the time points.
eg. for ID=101 and visit=1; grand_mean = (1.179829 + 1.155491 + ... +
1.221858)/6
ID=101 and visit=2; grand_mean = (1.129451 + 1.139536 + ... +
1.164232)/6 and so on...
Aldo, I wan to create a different grand mean just using mean values for Temp and
Angular i.e. for ID=101
ID=101 and visit=1; grand_mean = (1.155491 + 1.25507 + 1.155153 + 1.221858)/4
and so on.
Is there an easy way to accomplish this?
Thanks,
Debs
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