On Tue, Mar 17, 2009 at 12:54 PM, Bill Cunliffe wrote:
> Thanks for your help. Part of the problem was that I thought I was
> dealing with a data frame when it was actually an array. I forced all to be
> matrices for consistency. However, I see that
>
>
>
> avGain <- rbind(avGain[1:(j-1),],b,a
as positioning is important.
_
From: Levi Waldron [mailto:lwaldron.resea...@gmail.com]
Sent: Tuesday, March 17, 2009 12:17 PM
To: Bill Cunliffe
Cc: r-help@r-project.org
Subject: Re: [R] Difficulty Replacing a Row of a Data Frame
Your first example that works would just repeat the ato
Your first example that works would just repeat the atomic vector to the
length of the row. To replace a row with another data frame, you could use
rbind:
avGain <- rbind(avGain[-j,],b)
Or if the positioning is important,
2) avGain <- rbind(avGain[1:(j-1),],b,avGain[(j+1):nrow(avGain),])
I didn
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 wrote:
> I have the following data frames, avGain and retGain. They have the same
> dimensions.
>
>
>
> The following line
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 ) +
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