R help - Aug 2011 - boxplot from mean and SD data

Dear all,

I have a dataset of 3 categorical factors, the mean and the standard deviation
of each value. I want to use these values to plot a boxplot, grouped by each of
the 3 categorical factors (24 boxplots in total). I don't have a clue on how
to do the boxplot from mean and SD data already calculated.

Thanks in advance


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Hi
> 
> Dear all,
> 
> I have a dataset of 3 categorical factors, the mean and the standard 
> deviation of each value. I want to use these values to plot a boxplot, 
> grouped by each of the 3 categorical factors (24 boxplots in total). I 
> don't have a clue on how to do the boxplot from mean and SD data
already
calculated.

I am afraid that you can not do it. Only if you you accept assumption that 
distribution within each factor is normal and therefore median equals 
mean. You can than also use 25 an 75 percentile for box construction.

see ?boxplot and ?bxp for internals of plotting function.

One possibility also is to generate values by mean and sd parameters to 
rnorm, although I do not see the reason for doing it.

Regards
Petr

> 
> Thanks in advance
> 
> 
>    [[alternative HTML version deleted]]
> 
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