How to plot several graphs in a single 2-D figure?

-----Original Message-----
From: Feng Zhang [mailto:f0z6305 at labs.tamu.edu]
Sent: Thursday, April 10, 2003 4:03 PM
To: Iyue Sung
Cc: R-Help
Subject: Re: [R] How to plot several graphs in a single 2-D figure?


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