[R] Plot of multiple data sets

[Romain Francois]

Le 07.09.2005 16:00, Stéphane Mattei a écrit :

>Thank you all for your answers.
>
>I eventually use the points command
>
>plot(MATRIX[,1])
>points(MATRIX[,2])
>points(MATRIX[,3])
>...
>
>with matplot I had numbers instead of points with type="p" and par(new=TRUE) makes complications
>with the axis.
>  
>
So, add pch=21 or something else to your matplot call and you won't need 
an extra package for that.

R> matplot(iris[,1:4], type="p", pch=21)

Also, if you want to do it with plot and points, you must specify the y 
range like that :

R> plot(MATRIX[,1], ylim=range(MATRIX))
R> points(MATRIX[,2])
R> points(MATRIX[,3])

Proceeding that way, par(new=TRUE) won't make complications anymore.

Romain

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