Plot only certain points in R

Question

There is a very dense set of points I need to show - the pdf gets very large and I was thinking about only plotting every 10th data point

Example

plot(c(1:100),runif(100))

How do I only plot every 4th data? I know I could create a new input data frame but isn't there some easier thing?

Answer 1

You could do something like this:

x <- runif(100)

# Every 10th element
plot(x[seq.int(1, length(x), 10)])

# Every 4th element
plot(x[seq.int(1, length(x), 4)])