[R] Summary Statistics for data.frame
jdrapp at gmail.com
Sat Jul 8 21:44:48 CEST 2006
I apologize for my constant questions but I am new to R and trying to
gain an appreciation for its capabilities. The following task is easy
in Excel and I was hoping somebody could give me a quick explanation
for how it can be acheived in R so I can avoid having to switch
between the two applications.
How do I find the Summary Statistics in one Vector of the dataframe by
levels in another of the vectors.
For example, I have the following headings for my data.frame.
I would like to see compute the mean Height, Weight, and Ratio as well
as their variances for each of the years under Year
Drafted(1980-2000). What is the most efficient way of doing this?
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