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# st: RE: Random number generation in stata

 From "Nick Cox" <[email protected]> To <[email protected]> Subject st: RE: Random number generation in stata Date Wed, 8 Nov 2006 12:35:58 -0000

```For uniform random numbers in intervals other than 0 to 1,
just apply the linear transformation desired.

It seems that you just want integers. You are aware of -int()-.
-ceil()- and -floor()- also work nicely.

gen u15_34 = 15 + floor(20 * uniform())

I don't think there is a shortcut when you want a mix of
ranges. At some point you have to spell out all the details
and you might as well do that directly in a series of -generate-
statements.

Nick
[email protected]

Patrick Musonda

> I am trying to create a simulation program in stata. In this
> simulation, I
> would like to generate random numbers arising in various
> ranges, for example
> numbers between 0 to10, 0 to15, 0 to 20, 20 to 10 etc for
> several variables
> e.g. x1, x2, x3, x4 etc. Using the uniform distribution random number
> generator I can generate random numbers 0 to 10, or 0 to 100
> without any
> problem by doing something like:
>
> gen x1=int(10*uniform())
>
> How can I generate random numbers from other ranges, for
> example 15 to 35
> and how can I do this for several variables at once for example 5
> observation with three variables as shown below for random
> numbers 1 to 10,
> 8 to 15 and 10 to 25 respectively as shown below
>
> ob    x1   x2     x3
> 1      3     12     21
> 2      9     8       18
> 3      0     10     11
> 4     10    10     25
> 5      4     14     19

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```

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