[R] scatter plot using ggplot

Megh Dal megh700004 at yahoo.com
Tue Jul 22 10:42:44 CEST 2008

I used ggplot to create a scatter plot :

Sigma = matrix(c(1, 0.6, 0.6, 1), 2, 2)
x = rmnorm(20, c(0,0), Sigma)
xx = x[order(x[,1]),]
y = xx[,1]
z = xx[,2]
qplot(z, y, type="point", main="x-y plot", xlab="x", col="blue")

However I want following:

1. Plot color must be Blue (where it is displaying as red)
2. There should not be any color platted
3. Plot size must be larger than what it is displacing

Can anyone please tell me how to do that?


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