R help - Jan 2006 - R-help Digest, Vol 35, Issue 7

Hello, dear participants!

Could you tip me, is there any simple and nice way to build scatter-plot 
for three different types of data (, and o and * - signs, for example) 
with legend.

Now i can guess only that way:

plot(x~y,data=subset(mydata,factor1=='1'),
pch='.',col='blue')
points(x~y,data=subset(mydata,factor1=='2'),
pch='*',col='green')
points(.... etc

What is the simple and nice way?
Thank you very much for your kindness and help.

-- 
Evgeniy Kachalin

Evgeniy Kachalin wrote:
> Hello, dear participants!
> 
> Could you tip me, is there any simple and nice way to build scatter-plot 
> for three different types of data (, and o and * - signs, for example) 
> with legend.
> 
> Now i can guess only that way:
> 
> plot(x~y,data=subset(mydata,factor1=='1'),
pch='.',col='blue')
> points(x~y,data=subset(mydata,factor1=='2'),
pch='*',col='green')
> points(.... etc
> 
> What is the simple and nice way?
> Thank you very much for your kindness and help.
> 

Example:


with(iris,
   plot(Sepal.Length, Sepal.Width, pch = as.integer(Species)))
with(iris,
   legend(7, 4.4, legend = unique(as.character(Species)),
                     pch = unique(as.integer(Species))))


Uwe Ligges