问题
I am working on an assignment using R and the fitted density curve that is overlaid on the histogram is cut off at it's peak.
Example:
x <- rexp(1000, 0.2)
hist(x, prob = TRUE)
lines(density(x), col = "blue", lty = 3, lwd = 2)
I have done a search on the internet for this but didn't find anything addressing this problem. I have tried playing with the margins, but that doesn't work. Am I missing something in my code?
Thank you for your help!
回答1:
Here's the simple literal answer to the question. Make an object to hold the result of your density call and use that to set the ylim of the histogram.
x <- rexp(1000, 0.2)
tmp <- density(x)
hist(x, prob = TRUE, ylim = c(0, max(tmp$y)))
lines(tmp, col = "blue", lty = 3, lwd = 2)
(should probably go to SO)
来源：https://stackoverflow.com/questions/32548705/how-to-avoid-density-curve-getting-cut-off-in-plot