how to get variance?

The answer is
?cor
but this question is not really appropriate for this list. Read one of
the fine introductions to R, and turn to this list only when you get
stuck.

-Best,
Ista

I've got this table:


? ? A ? B
1 ?7.8 215
2 ?6.8 280
3 ?9.4 356
4 ?5.2 ?38
5 ?8.2 167
6 ?4.8 127
7 ?3.7 ? 8
8 ?6.2 201
9 ?9.7 346
10 8.1 241

how can I get the variance and covariance of A and B?
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Ista Zahn
Graduate student
University of Rochester
Department of Clinical and Social Psychology
http://yourpsyche.org

I've got this table:


    A   B
1  7.8 215
2  6.8 280
3  9.4 356
4  5.2  38
5  8.2 167
6  4.8 127
7  3.7   8
8  6.2 201
9  9.7 346
10 8.1 241

how can I get the variance and covariance of A and B?

?var

(If that hadn't been your first guess, you could always have tried:

??covariance


But maybe not:

RSiteSearch(covariance)   # the term is ubiquitous in statistics  
documents

... and I'm guessing that the number of choices offered would be a lot  
smaller on someone's machine who is just starting out and has few  
extra packages installed than it was on my machine. I think maybe you  
need to do some more self-study of the "Introduction to R" document).

David Winsemius, MD
Heritage Laboratories
West Hartford, CT