Displaying 1 result from an estimated 1 matches for "calcualtign".
2006 Mar 29
1
calcualtign a trailing 12 column mean in a dataframe?
I have a dataframe of 25 columns and 100,000 rows
called ?testdf?.
I wish to build a new dataframe, with 14 columns and
100,000 rows.
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:
?( mean(testdf[,1:12],na.rm=T)?
What is the best way to accomplish this?