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The below sample graph was created using R, for an example I came across while reading (on Distribution of time until customer x arrives):

t <- seq(0,1,0.01)
ft <- 100*t*exp(-10*t)
plot(t,ft,type="l", xlab="T", ylab="f(t)")
title(main=expression(paste("Probability density function of ", Gamma(2,frac(1,10)))));

The graph looks like a Percent Point Function, even though it isn't exactly.Am trying to understand on how I interpret it, but am not getting it.

Can someone help on how to read the above plot?

Thanks,
-Kamal.

kamal
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  • More background information for this question is available [on math.SE](http://math.stackexchange.com/q/903025/15941). – Dilip Sarwate Aug 20 '14 at 11:22
  • As the `main` title asserts, this is a probability *density* function. As you might imagine, this basic tool [appears in thousands of posts here](http://stats.stackexchange.com/search?q=probability+density+function), many of which will illuminate the question by showing how such plots are to be understood and read. The basics are explained in the apparent duplicate. – whuber Aug 20 '14 at 13:45

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