Displaying 2 results from an estimated 2 matches for "weigt".
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2006 Feb 07
2
question about binary data file and data.frame
I have a binary file with data sequence in the order
[age,weight][age,weight] ....
I know the length of the data and I want to load it into a data.frame. of course a way to do this is to
read age and weight seperately and then use cbin(age,weight) to combine them into a dataframe, but is there a better
solution?
Thanks in advance!
2009 Oct 10
1
many weighted means: is there a simpler way?
...t = runif(10))
df
g <- function(x) weighted.mean(x[, 1], x[, 2])
by(df[,c("v1","wt")],df[,c("year","gender")],g)
I can use as above by command for each variable (v1,v2)
separately but I wonder if there is some simpler way
that yields a table/data frame of weigted means for all
"vi"s where i=1...N.
Thank you very much,
ozan
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