GRANDOM

Purpose:

Generates a random series based on a uniform or flat distribution. The optional range arguments let you determine the output range.

Syntax:

GRANDOM(length, spacing, rangelow, rangehigh)

length	-	An integer. The length of the output series.
spacing	-	A real, the spacing (delta x) between each point of the x-axis.
rangelow	-	Optional. A real, the low end of the range. Defaults to 0.0
rangehigh	-	Optional. A real, the high end of the range. Defaults to 1.0

Returns:

A series.

Example:

grandom(100,0.1,1,10)

generates a uniformly distributed random series of 100 points, spaced every 0.1 x-units, with values ranging from 1 to 10.

W1: grandom(50000,1)

W2: hist(W1, 30)

$image\grandompic.gif$

The histogram in W2 indicates that the random sequence in W1 is uniformly distributed.

Remarks:

If no range is given, default is [0,1]. If only one range is given, range is [0,range] or [range,0], depending on whether range is positive or negative.

See SEEDRAND to set a new seed value for the pseudo-random sequence.