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Difficulty Replacing a Row of a Data Frame
5 messages · Bill Cunliffe, stephen sefick, Levi Waldron
not off the top of my head, but if you provide a reproducible example (cut and paste into R) then I may be able to help you.
On Tue, Mar 17, 2009 at 10:44 AM, Bill Cunliffe <bill at elevationllc.net> wrote:
I have the following data frames, avGain and retGain. ?They have the same dimensions. The following line of code replaces row j of avGain as desired: avGain[j, ] <- mean( retGain[jStart:j, ] ) However, the following line does not work: avGain[j, ] <- ( avGain[j-1, ] * ( DAYS - 1 ) + retGain[j, ] ) / DAYS If I do the following, and test to see if a or b are data frames. a <- mean( retGain[jStart:j, ] ) b <- ( avGain[j-1, ] * ( DAYS - 1 ) + retGain[j, ] ) / DAYS I find that a is not, but b is indeed a data frame. ?I guess this is part of my problem. Does anyone know why one works and the other doesn't, and how I can replace a row of a data frame with another data frame? ? ? ? ?[[alternative HTML version deleted]]
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