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samplerows
2007 Feb 19
3
Randomly extract rows from a data frame
Hi,
I am looking for a way to randomly extract a specified number of rows from a
data frame. I was planning on binding a column of random numbers to the
data frame and then sorting the data frame using this bound column. But I
can't figure out how to use this column to sort the entire data frame so
that the content of the rows remains together. Does anyone know how I can
do this? Hints
2008 Jan 04
2
R2WinBUGS sending variables as factors
...1.0E-6)
}
##R Code
library(R2WinBUGS)
library(Rlab)
#sampling functions
#get a subset of the data to use in the modelling process
LearnSamp <- function (dBUGS) # data frame of the variables of interest
{
rnames<- row.names(dBUGS)
sampRows <- sample(rnames,900)
learnSamp <- subset(dBUGS,rnames%in%sampRows)
}
#maybe not needed index.inits <- function ()
# get data into correct form for R2WinBUGS
d <-LearnSamp(dBUGS)
YFTCPUE <- d$CPUE
Month <- d$Month
Lat <- d$Lat
SeaW <- d$S...