Many thanks Phil, that does help.
If I could ask a follow-up, how do I put each plot in its own device
window? Right now, all I get is the boxplot for var2 (var1 gets
overwritten?). I tried putting quartz() before the boxplot command but
got an error message.
Cheers,
Shawn
On 22/06/10 11:13 AM, Phil Spector wrote:
Shawn -
Does this example help? (Please don't use cbind when creating
a data frame, since it first creates a matrix, which means everything
must be of the same mode.)
var1 = rnorm(1000)
var2 = rnorm(1000)
TimePeriod = rep((LETTERS[1:4]), 250)
my.data = data.frame(var1,var2,TimePeriod)
lapply(names(my.data)[1:2],
+ function(y)boxplot(formula(paste(y,'TimePeriod',sep='~')),
+ main=y,data=my.data))
- Phil Spector
Statistical Computing Facility
Department of Statistics
UC Berkeley
spec...@stat.berkeley.edu
On Tue, 22 Jun 2010, Shawn Morrison wrote:
Hi all,
I have a dataset with several variables, each of which is a separate
column. For each variable, I want to produce a boxplot and include
the name of the variable (ie, column name) on each plot.
I have included a sample dataset below. Can someone tell me where I
am going wrong?
Thank you for your help,
Shawn Morrison
# Generate a sample dataset
var1 = rnorm(1000)
var2 = rnorm(1000)
TimePeriod = rep((LETTERS[1:4]), 250)
my.data = as.data.frame(cbind(var1, var2, TimePeriod)); summary(my.data)
attach(my.data)
# Create box plots for var1 and var2 using TimePeriod on the x-axis
lapply(my.data[,1:2], function(y) {
boxplot(y~TimePeriod,
main = y
data = my.data)
})
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