Dear R-list,
I try to calculate the 10- and 90-Percentile from grouped data.
Using 'lappy' it works fine but I have no success with 'gapply':
df <- data.frame(test = runif(100))
df <- df[order(df[,1]),]
z <- rep(1:10, each = 10)
lapply(split(df, z), function(x) quantile(x, probs=c(10,90)/100))
library(nlme)
gapply(as.data.frame(df), which=1,
function(x) quantile(x, probs=c(10,90)/100), group=z)
# Error in sort(x, partial = unique(c(lo, hi))) :
# `x' must be atomic
Thanks for any help
Patrick
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