x11()
plot(density(a))
lines(density(d))
x11()
plot(density(b))
lines(density(e))

2011/10/12 pigpigmeow [via R] <ml-node+s789695n3898183h75@n4.nabble.com>:
> however, if i have an excel file, but there have 6 variables, a,b,c,d,e,f.
>
>
> how to plot the probability density function of a and d in one graph, b and
> e in another graph?
>
>
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-- 
Juan David Ospina Arango


-----
Juan David Ospina Arango

School of Statistics
Universidad Nacional de Colombia, Colombia

Laboratoire de Traitement du Signal et de l'Image
Université de Rennes 1, France
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