On May 31, 2010, at 2:06 PM, ecvet...@uwaterloo.ca wrote:
I have a data frame 10 by 12 with positive and negative numbers. I
want to select only the positive numbers and find the average.
This calculates the average of everything:
av5 <- subset(ER9r, Day == 253, select = c (Depth1j:Depth0.75j)
That looks to be missing a closing paren. If so, then after fixing you
first line try:
mean( av5[av5>0] )
av5 <- mean(av5)
I need something along the lines of "select" av5>0
Thanks in advance!
Emilija
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David Winsemius, MD
West Hartford, CT
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