Displaying 1 result from an estimated 1 matches for "initrchid".
2012 Oct 24
1
randomly select another observation with same grouping factor and year value, do for every record in dataframe
...and several other characteristics of the randomly chosen observation. Below is the code I have written, but it doesn't work.
Thanks for any help.
Christy
################test
roads=read.csv("streamland23.csv")
for (i in 1:nrow (roads)){
Sitetype= roads$Sitetype
yr=roads$REACH_Yr
initRchid=roads$RchID
huc1=roads$HUC
sample.df <- function(df, n) df[sample(nrow(df), n), , drop = FALSE]
selected=sample.df(roads[roads$HUC == "huc1"& roads$REACH_Yr =="yr" , ], 1)
output=cbind (initRchid,selected$RchID,selected$Sitetype,selected$REACH_Yr)
}
Christy Mered...