Displaying 2 results from an estimated 2 matches for "sumd".
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2011 Sep 03
2
problem in applying function in data subset (with a level) - using plyr or other alternative are also welcome
...t;- ifelse(mydf[x[1]] == mydf[x[3]], 1, -1)
ot2 <- ifelse(mydf[x[2]] == mydf[x[4]], 1, -1)
qt <- ot1 + ot2
return(qt)
}
qt <- apply(mmat, 1, myfun)
ydv <- c((y - mean(y))^2)
qtd <- data.frame(ped, ydv, qt)
# second function
myfun2 <- function(dataframe) {
vydv <- sum(ydv)*0.25
sumD <- sum(ydv * qt)
Rt <- vydv / sumD
return(Rt)
}
# using plyr
require(plyr)
dfsumd1 <- ddply(mydf,.(mydf$ped),myfun2)
Here are 2 issues:
(1) The output just one, I need the output for all three set of variables
(as listed above)
(2) all three values of dfsumd is returning to same for al...
2009 May 20
10
How to google for R stuff?
Hi! I'm new to R programming, though I've been programming in other
languages for years.
One thing I find most frustrating about R is how difficult it is to use
Google (or any other search tool) to look for answers to my R-related
questions. With languages with even slightly more distinctive names like
Perl, Java, Python, Matlab, OCaml, etc., usually including the name of the
language