overlay points on plot
In a message dated 2/18/2004 10:13:53 AM Pacific Standard Time, femke at geog.umd.edu writes:
Dear R-help list, I'm trying to overlay a number of data objects in a plot. Following an
earlier example on the >list I've created an empty plot as follows
xlim <- range(as.numeric(c("0","10000")))
ylim <- range(as.numeric(c("0","25")) )
plot(NA, xlim=xlim, ylim=ylim, xlab="distance", ylab="semivariance")
However when I try to plot something on it, I get the following error:
points(v[2],v[3])
Error in as.double.default(x) : (list) object cannot be coerced to double
Try points(v[, 2], v[, 3]) ? Dan Nordlund