How can I generate random numbers between 0 and 1 in matlab but at least on number of the generated should have a value above 0.8 ?

I want to generate a vector of random numbers between 0 and 1 in matlab and I use the "rand " function. However, I need that every time I generate this vector  one number only has a value above...

02 February 2017 2,879 13 View