[R] How to get Quartiles when data contains both numeric variables and factors

[aajit75]

When data contains both factor and numeric variables, how to get quartiles
for all numeric variables?
n <- 100 
x1 <- runif(n) 
x2 <- runif(n) 
x3 <- x1 + x2 + runif(n)/10 
x4 <- x1 + x2 + x3 + runif(n)/10 
x5 <- factor(sample(c('a','b','c'),n,replace=TRUE))
x6 <- factor(1*(x5=='a' | x5=='c')) 
data1 <- cbind(x1,x2,x3,x4,x5,x6) 
data <- data.frame(data1) 

data <- within(data,{x5 <- factor(x5)})
x <- data

qs <- sapply(x, function(x) quantile(x, c(0.01, 0.99))) 

I get an error: Error in quantile.default(x, c(min_pct, max_pct)) : factors
are not allowed

Thanks for the help.


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