I wanna fill my array in Julia by positive real numbers. But I found information only how to do it with integers or real numbers (including negatives). Is it possible? Thanks!

CodePudding user response：

You can use any mathematical formula that maps the [0, 1) range into the [0, inf]:

For example, if x is your random variable in the [0, 1) range (obtained with e.g. rand() for float data types):

• tan(x * pi / 2)
• atanh(x)
• log(x) ^ 2
• -log(x) / x ^ p (for p non-negative integer -- it will change the number distribution)

There are many other functions.

Of course the numbers are no longer uniformly distributed, but that is impossible to achieve.