List,

I am trying to extract summary statistics from a data frame with several
variables (and NAs) into a dataframe with the columns: Variablename (ie the
colnames of original data), mean, stdev, max, min, Valid N, Missing Values.

Extracting the statistics is straightforward using stack and aggregate.
However, I haven't succeeded in obtaining the number of Missing Values. I
can extract these from describe (Hmisc library), but surely there is a
simpler way similar to obtaining the mean using aggregate?

Suggestions are much appreciated
Thanks Herry

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Alexander Herr - Herry
CSIRO Sustainable Ecosystems:
http://www.cse.csiro.au/
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