[R] color for points

[vincent@7d4.com]

Sam R. Smith a écrit :

> Hi,
> I have the following code to randomly generate the points:
> csr <-function(n=60){
> x=runif(n)
> y=runif(n)
> f=cbind(x,y)
> }
> plot(csr())
>  
> I wonder how to code to make the first twenty points to be BLUE; second twenty points to be RED; the last twenty points to be GREEN?

mynewfct = function(n=60)
{
x=runif(n)
y=runif(n)
f=cbind(x,y)
plot(f[1:20] , col='blue');
par(new=T);
plot(f[21:40] , col='red');
par(new=T);
plot(f[41:60] , col='green');
}

hih