R模拟反正态分布

Question

I'm wondering is there any function in R that we can use to simulate a distribution opposite to the normal distribution? by opposite i mean instead of starting from a low value and gradually increasing to a peak and then gradually decreasing , i want this distribution to start from a high value then gradually decreasing to a small value and then increasing to initial value. thanks.

Answer 1

If you are looking for a probability distribution that starts high, goes low and ends high then try beta distribution with alpha = beta = 0.5 . In R:

rb <- rbeta(1000, 0.5, 0.5)
hist(rb)

It produces values between (0,1) , you might want to scale and/or shift it appropriately.