SEED

Name:

SEED Type:

Support Command Purpose:

Specify the seed for random number generation. Description:

Dataplot supports several different random number generators. The desired generator can be set with the command

SET RANDOM NUMBER GENERATOR <generator>

where <generator> is one of the following:

The deault generator is the FIBONACCI CONGRUENTIAL generator (the default prior to 2018/05 was the FIBONACCI generator).

The seed value applies to the following generators

For the FIBONACCI and FIBONACCI CONGRUENTIAL generators, the minimum seed value should be 305 and the seed should be an odd number. Values of the seed less than 305 are equivalent to 305 and even values of the seed are equivalent to the nearest odd number.

For the other generators, if you want to obtain a different sequence of random numbers you can do something like the following

This example will first generate 50,000 random numbers that will not be used. It then generates 10,000 random numbers that will be used. To obtain a different sequence of random numbers, modify the value of ISKIP.

Syntax:

Examples:

Note:

PROBE SEED

Default:

Synonyms:

None Related Commands:

RANDOM NUMBERS (LET)	=	Generate random numbers for various distributions.
SET RANDOM NUMBER GENERATOR	=	Specify the random number generator to use.

Applications:

Random Number Generation Implementation Date:

Pre-1987 Program:

 
SEED 4021
LET Y1 = NORMAL RANDOM NUMBERS FOR I = 1 1 100
SEED 34201
LET Y2 = NORMAL RANDOM NUMBERS FOR I = 1 1 100
SEED 19793
LET Y3 = NORMAL RANDOM NUMBERS FOR I = 1 1 100
SEED 46987
LET Y4 = NORMAL RANDOM NUMBERS FOR I = 1 1 100
LINE COLOR BLACK BLUE RED GREEN
MULTIPLE KERNEL DENSITY PLOT Y1 Y2 Y3 Y4