random
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Contents: Description, Arguments, Usage, Examples, Related Functions Supported Under Version: >1.69 Current Davinci Version: 2.27 64-bit Safe: Yes
Description Generates random numbers
Arguments and Return Values Arguments: dimension and seed parameters Return Value: a numeric array containing random numbers
Usage Syntax: random([x = INT] [, y = INT] [, z = INT] [, seed = INT] [, type = STRING]) The random() function generates random numbers, with a distribution specified by the type parameter. The possible values for type, and the types of numbers generates are: type distribution type interval ------- ------------ ---- ------------ uniform uniform float [0.0, 1.0] # default value drand48 uniform float [0.0, 1.0] mrand48 uniform int [-2^31, 2^31] normal gaussian float * gauss gaussian float * rand simple int [0, (2^15)-1] random simple int [0, (2*31)-1] The gaussian distribution has a mean of 0.0, and a standard deviation of 1.0. The value seed can be specified to seed any of the random number generators, to produce reproducable random numbers. Any dimension not specified defaults to a value of 1. Some of these types may not be available on all systems.
Examples dv> random(3,3,3) 3x3x3 array of float, bsq format [108 bytes] 0.826597 0.879055 0.604216 0.778096 0.205341 0.293955 0.257071 0.240723 0.720289 0.147112 0.399489 0.835683 0.356612 0.185553 0.978434 0.659467 0.114649 0.558853 0.436106 0.803163 0.133404 0.414845 0.194053 0.433575 0.833470 0.0127538 0.520705 dv> random() 0.516770 |
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Recent Core Changes Modified On: 07-06-2009 |
