R help - Nov 2005 - How to plot two dataset in one fig?

Hi all,

I am new in R tool. I would like to plot two dataset in in fig.

Here is what I did for both a and b data sets

jpeg(file="a.jpeg")
dat<-read.table('a', header=F, sep=',') 
dim(dat)
y<-dat[,1]
y<-y[!is.na(y)]
plot(y);lines(lowess(y, f=0.05), col = 
("red"), lwd=5)
dev.off

Two questions: 
1. How I can save this lowess smooth data?
2. Once I have the smooth a and b data, How I can put two smooth data sets 
in one fig even they have different Y ranger value?

Any input will be greatly appreciated.

Lucy

If I understand your question, to superimpose two lines in a same plot, in 
the first call to plot() you want to set the plot(ylim) argument with a 
range that will fit both of your lines.  Then use lines() to add the second 
lowess line on the plot.  Or matplot() will automate the process for you.

Take a look at savePlot() to save your final figure.


Francisco
>From: Wei Qiu <wqiu at nmr.mgh.harvard.edu>
>To: r-help at stat.math.ethz.ch
>Subject: [R] How to plot two dataset in one fig?
>Date: Fri, 18 Nov 2005 16:38:48 -0500 (EST)
>
>Hi all,
>
>I am new in R tool. I would like to plot two dataset in in fig.
>
>Here is what I did for both a and b data sets
>
>jpeg(file="a.jpeg")
>dat<-read.table('a', header=F, sep=',')
>dim(dat)
>y<-dat[,1]
>y<-y[!is.na(y)]
>plot(y);lines(lowess(y, f=0.05), col >("red"), lwd=5)
>dev.off
>
>Two questions:
>1. How I can save this lowess smooth data?
>2. Once I have the smooth a and b data, How I can put two smooth data sets
>in one fig even they have different Y ranger value?
>
>Any input will be greatly appreciated.
>
>Lucy
>
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