[R] Multi-line plots with matrices in R

[Petr Pikal]

Hi

see matplot, matlines.

or use forbidden for cycle.

for (i in 1:n) lines(x,y[,i], col=i)

or if you want to use more colours use built in rainbow, topo.colors 
or generate your own set.

Regards
Petr


On 7 Mar 2007 at 12:30, Joseph Wakeling wrote:

Date sent:      	Wed, 07 Mar 2007 12:30:46 +0000
From:           	Joseph Wakeling <joseph.wakeling at webdrake.net>
To:             	r-help at stat.math.ethz.ch
Subject:        	[R] Multi-line plots with matrices in R

> Hello all,
> 
> I'm a new user of R, experienced with Octave/MATLAB and therefore
> struggling a bit with the new syntax.
> 
> One of the easy things in Octave or MATLAB is to plot multiple lines
> or
>  sets of points by using a matrix where either the columns or the rows
> contain the y-values to be plotted.  Both packages automatically give
> each line/points their own unique colour, character etc.
> 
> I'm wondering how I get the same functionality in R.  For example, if
> X is a vector of x-values and Y is a matrix whose rows contain the
> y-values, I can do,
> 
> apply(Y,1,lines,x=X)
> 
> ... but of course everything is all in black, with the same type of
> line or points.  I'd like each line to have its own unique colour
> and/or style.
> 
> Another thing I'd like clarification on is the ability to update an
> existing plot.  For example if I do,
> 
> plot.window(xlim=c(0,100),ylim=c(0,1))
> 
> and then after plotting data decide I want ylim=c(0,0.5), how do I
> update the graphic?  A new plot.window() command does nothing.
> 
> Many thanks,
> 
>     -- Joe
> 
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Petr Pikal
petr.pikal at precheza.cz