# [R] How to plot several graphs in a single 2-D figure?

Feng Zhang f0z6305 at labs.tamu.edu
Thu Apr 10 22:03:24 CEST 2003

```Thanks, Iyue

But here the data1 and data2 are not necessarily two vectors.
Maybe they are results from some other functions, defined
as a data structure.
Like using norMix package,

x <- norMix(mu=c(-1,0,1.5),sig2=c(.49,.36,.16),w=c(.4,.3,.3));
plot(x); %% x is not a vector, but a structure
y <- norMix(mu=c(-2,0,2),sig2=c(.16,.36,.64),w=c(.4,.3,.3));
par(new=T);
plot(y);

The result graph is messed up and x,y dont have consistent axis label
settings.

Fred

----- Original Message -----
From: "Iyue Sung" <isung at epidemiology.com>
To: "Feng Zhang" <f0z6305 at labs.tamu.edu>
Sent: Thursday, April 10, 2003 2:55 PM
Subject: RE: [R] How to plot several graphs in a single 2-D figure?

Fred, Try:

>xrange<-range(c(data1[,1],data2[,1]))
>yrange<-range(c(data1[,2],data2[,2]))
>
>plot(data1, xlim=xrange, ylim=yrange, pch=1)
>points(data2, pch=2)

-Iyue

> -----Original Message-----
> From: Feng Zhang [mailto:f0z6305 at labs.tamu.edu]
> Sent: Thursday, April 10, 2003 3:39 PM
> To: R-Help
> Subject: [R] How to plot several graphs in a single 2-D figure?
>
>
> Hi, R-listers
>
> I tried to plot several graphs in a sigle x-y coordinate
> settings, like the
> following:
> |(y)                           s
> |    ******               s
> |               *****      s
> |    sssssssssssssssssss
> |_______________________________(x)
> where "*" and "s" denote two diffrent plots.
>
> However, when I used
> plot(data1); % data1 is the data points of "*"
> par(new=T);
> plot(data2); % data2 is the data points of "s"
>
> I found that the x and y labels are messed up, since
> different graphs use
> diffrent unit length on the x-axis and y-axis.
>
> So is there someway to avoid this problem?
> Or is there some other function plottting multiple plots in
> one x-y axis setting?
>
> Thanks for your point and help.
>
> Fred
>
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>

```