[R] boxplot

[Robert Baer]

On the subject of boxplots, I have multiple data sets of unequal sample 
sizes and was wondering what would be the most efficient way to read in 
the data and plot side-by-side boxplots, with options for controlling 
the orientation of the plots (i.e. vertical or horizontal) and the 
spacing? Your assistance is greatly appreciated, but please try to be 
explicit as I am no R expert.

Thanks Janh

Not sure without a reproducible example (please read posting guide) but 
maybe this will help:

a = sample(1:100, 30)
b = sample(1:100, 50)
c = sample(50:100,19)
d = sample(1:50, 15)
e = sample(1:50, 15)
f = sample(1:50, 25)

x11(width = 7, height = 3.5)
op =par(mfrow = c(1,2))  # plot side by side

# horizontal
boxplot(list(a,b,c), horizontal = TRUE, main = 'Horizontal',
     xlim = c(0,9), names = c('a', 'b','c'))
boxplot(list(e, f), horizontal = TRUE, xlim = c(0,9), names = c('e', 'f'),
     at = c(7,8), add = TRUE, col ='red')

# vertical
boxplot(list(a,b,c), horizontal = FALSE, xlim = c(0,9), main = 'Verticalal',
      names = c('a', 'b','c'))
boxplot(list(e, f), horizontal = FALSE, xlim = c(0,9), names = c('e', 'f'),
     at = c(7,8), add = TRUE, col ='red')
par(op)

Cheers,

Rob



___
  Robert W. Baer, Ph.D.
Professor of Physiology
Kirksille College of Osteopathic Medicine
A. T. Still University of Health Sciences
Kirksville, MO 63501 USA