ANOVA with mean and SD?

Ben Abbott bpabbott at mac.com
Wed Sep 3 10:22:04 CDT 2008


On Wednesday, September 03, 2008, at 10:27AM, "Wolfgang Schechinger" <hubahopp at gmx.de> wrote:
>Dear experts, 
>
>I need to analyze 2500 parameters in 3 groups by ANOVA, means I want to detect which parameters vary between the groups. 
>
>For every group I have a table with 
>
>number of data points (may vary from group to group)
>mean
>standard deviation. 
>
>(3x3 columns, 2500 rows)
>
>As I understand the anova(y,g) function, one needs to supply the raw data and there should be the same number of data points per colum at least for each parameter.
>
>Is there a way to adapt the function to my data set, or is there another function one could use?
>
>What can I do when my data does not follow a normal distribution?
>
>Many thanks for your help!
>
>Wolfgang
>

Is there a reason you can't concatenate all groups into one vector and use the 2nd input to identify the group each sample corresponds to?

Ben


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