 

Hi,

 

I had sent this email last week, but received no reply.  So, I am resending
it - please excuse me for the redundant email.

 

I have a simple problem that I would appreciate getting some tips.  I am
using the "truehist" function within an "apply" call to plot multiple
histograms.  I can't figure out how to get truehist to use the column names
of the matrix as the labels for the x-axis of the histograms.  

 

Here is a simple example:

 

library(MASS)  # this contains the truehist function

X <- matrix(runif(4000),ncol=4)

colnames(X) <- c("X1","X2","X3","X4")

par(mfrow=c(2,2))

apply(X, 2, function(x)truehist(x))

 

In this example, I would like the x-labels of the histograms to be "X1",
"X2", etc.

 

Any help is appreciated.

 

Best,

Ravi

 

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Ravi Varadhan, Ph.D.

Assistant Professor, The Center on Aging and Health

Division of Geriatric Medicine and Gerontology 

Johns Hopkins University

Ph: (410) 502-2619

Fax: (410) 614-9625

Email: rvaradhan@jhmi.edu

Webpage:  http://www.jhsph.edu/agingandhealth/People/Faculty/Varadhan.html

 

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