Functions and CALL Routines |
Returns a random variate from a triangular distribution.
Category: |
Random Number
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Tip: |
If you want to change the seed value during execution,
you must use the CALL RANTRI routine instead of the RANTRI function.
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seed
-
is a numeric constant, variable, or expression
with an integer value. If seed
0, the time of day is used
to initialize the seed stream.
Range: |
seed <
231-1 |
See: |
Seed Values for more information about seed
values |
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h
-
is a numeric constant, variable, or expression
that specifies the mode of the distribution.
The RANTRI function returns a variate
that is generated from the triangular distribution on the interval (0,1) with
parameter h, which is the modal value of the distribution. An
inverse transform method applied to a RANUNI uniform variate is used.
A triangular distribution X on the interval
(A,B) with mode C, where A
C
B, can be generated:
x=(b-a)*rantri(seed,(c-a)/(b-a))+a;
For a discussion about seeds and streams of data, as well as examples
of using the random-number functions, see Generating Multiple Variables from One Seed in Random-Number Functions.
The CALL RANTRI routine, an
alternative to the RANTRI function, gives greater control of the seed and
random number streams.
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Functions and CALL routines:
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Copyright © 2011 by SAS Institute Inc., Cary, NC, USA. All rights reserved.