25.1.2.1 Commands

The following commands on the RNG class can be accessed from OTcl and are found in tools/rng.cc:

seed $n$

- seed the RNG to $n$, if $n == 0$, the seed is set according to the current time and a counter

next-random

- return the next random number

seed

- return the current value of the seed

next-substream

- advance to the next substream

reset-start-substream

- reset the stream to the beginning of the current substream

normal $avg$ $std$

- return a number sampled from a normal distribution with the given average and standard deviation

lognormal $avg$ $std$

- return a number sampled from a lognormal distribution with the given average and standard deviation

The following commands on the RNG class can be accessed from OTcl and are found in tcl/lib/ns-random.tcl:

exponential $mu$

- return a number sampled from an exponential distribution with mean $mu$

uniform $min$ $max$

- return an integer sampled from a uniform distribution on [$min$, $max$]

integer $k$

- return an integer sampled from a uniform distribution on [0, $k$-1]