[R] calcualtign a trailing 12 column mean in a dataframe?
ruser2006 at yahoo.com
Wed Mar 29 23:52:52 CEST 2006
I have a dataframe of 25 columns and 100,000 rows
I wish to build a new dataframe, with 14 columns and
I wish the new dataframe to have the trailing 12
column mean. That is, I want column 1 of the new
dataframe to have soemthing like:
What is the best way to accomplish this?
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