Re: [R] Line Graph Labels

thanks again walmes. but the new problem would be that not all of the peaks are the same intensity. therefore the top five datapoints from my highest peak have greater intensity values than the highest point in the second-highest peak. but this is once again helpful. i found that there is a libra

Re: [R] Line Graph Labels

You can set the number of extreme points to be labeled instead of define a cutoff. Look: da <- data.frame(y=rnorm(50), x=1:50) plot(y~x, data=da) abline(h=c(-2,2), lty=3) with(da, text(x[abs(y)>2], y[abs(y)>2], label=x[abs(y)>2], pos=2)) da <- da[order(da$y),] plot(y~x, data=da) # five small and

Re: [R] Line Graph Labels

Thanks Walmes, that does indeed work well for labeling all points greater than some specified value. But the problem is that while my peaks are very sharp there is more than one point along the line as it slopes up. This method will label those points as well , making the data look cluttered. Ide

Re: [R] Line Graph Labels

You can adapt the following example da <- data.frame(y=rnorm(50), x=1:50) plot(y~x, data=da) abline(h=c(-2,2), lty=3) with(da, text(x[abs(y)>2], y[abs(y)>2], label=x[abs(y)>2], pos=2)) Walmes. - ..ooo0 .