From: Aline Santos <alinexss_at_gmail.com>

Date: Fri, 11 Mar 2011 10:32:18 +0100

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Fri 11 Mar 2011 - 10:33:53 GMT

Date: Fri, 11 Mar 2011 10:32:18 +0100

sample replicate height weight age

A 1.00 12.0 0.64 6.00 A 2.00 12.2 0.38 6.00 A 3.00 12.4 0.49 6.00 B 1.00 12.7 0.65 4.00 B 2.00 12.8 0.78 5.00 C 1.00 11.9 0.45 6.00 C 2.00 11.84 0.44 2.00 C 3.00 11.43 0.32 3.00 C 4.00 10.24 0.84 4.00 D 1.00 14.2 0.54 2.00 D 2.00 15.67 0.67 7.00 D 3.00 15.11 0.81 7.00

Now, how can I calculate the mean for each condition (heigth, weigth, age) in each sample, considering the samples have different number of replicates?

The final matrix should look like:

sample height weight age

A 12.20 0.50 6.00

B 12.75 0.72 4.50 C 11.35 0.51 3.75 D 14.99 0.67 5.33

This is a simplified version of my dataset, which consist of 100 samples (unequally distributed in 530 replicates) for 600 different conditions.

I appreciate all the help.

A.S.

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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code. Received on Fri 11 Mar 2011 - 10:33:53 GMT

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