Search Archives
Search tips
from:Name
Search by author name, e.g. from:Duncan Murdoch
"exact phrase"
Match an exact phrase
word1 word2
Match messages containing both words
Date range
Use the date pickers to filter results to a time period
Use the list dropdown to narrow results to a specific mailing list. Combine from: with other terms to filter by author and content.
sd() of column, but for a subset of rows
Shaw, Stephanie
·
Sep 25, 2008
·
r-help
I would like to take the standard deviation of a column, but only for a subset of the rows in that column with a given index. The following loop worked fine when I wanted the mean, but is not working...
Can't find what you're looking for? Try searching with Google .