[R] help on barplot

Murad Nayal mn216 at columbia.edu
Mon Jul 21 04:16:44 CEST 2003


I am trying to compare two histograms using barplot. the idea is to plot
the histograms as pairs of columns side by side for each x value. I was
able to do it using barplot before but I can't remember now for the life
of me now how I did it in the past:

> d
              [,1]         [,2]
-37.5 0.0000000000 2.789396e-05
-32.5 0.0001394700 5.578801e-05
-27.5 0.0019804742 1.732218e-02
-22.5 0.0217294282 1.380474e-01
-17.5 0.0938912134 4.005579e-02
-12.5 0.0630683403 4.351464e-03
-7.5  0.0163179916 8.368201e-05
-2.5  0.0025941423 5.578801e-05
2.5   0.0002789400 0.000000e+00
7.5   0.0000000000 0.000000e+00

> barplot(d,beside=TRUE)

barplot here plots two separate 'sets' of columns, on the left side a
bar plot of d[,1] is plotted while on the right side a separate bar plot
of d[,2] is plotted. how can I combine the two?

actually, while on the subject of histograms. is it possible to plot a
3D-histogram in R (a true 3D bar plot, without using image).

many thanks

Murad Nayal M.D. Ph.D.
Department of Biochemistry and Molecular Biophysics
College of Physicians and Surgeons of Columbia University
630 West 168th Street. New York, NY 10032
Tel: 212-305-6884	Fax: 212-305-6926

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