8.2.45.56 octave.dataset.randu

Static Method: out = randu ()

Random Numbers from Congruential Generator RANDU

Description

400 triples of successive random numbers were taken from the VAX FORTRAN function RANDU running under VMS 1.5.

Format

record

Index of the record.

x

X value of the triple.

y

Y value of the triple.

z

Z value of the triple.

Details

In three dimensional displays it is evident that the triples fall on 15 parallel planes in 3-space. This can be shown theoretically to be true for all triples from the RANDU generator.

These particular 400 triples start 5 apart in the sequence, that is they are ((U[5i+1], U[5i+2], U[5i+3]), i= 0, ..., 399), and they are rounded to 6 decimal places.

Under VMS versions 2.0 and higher, this problem has been fixed.

Source

David Donoho

Examples

t = octave.dataset.randu;