random

Set the default random number generator used in CPPTRAJ

random [setdefault {marsaglia|stdlib|mt|pcg32|xo128}]
       [createset count <#> [seed <#>] 
       settype {int|float01|gauss [mean ] [sd ]}] 
setdefault If specified, change the default random number generator (RNG). 
    marsaglia Use the Marsaglia RNG that is used in the Amber MD programs sander/pmemd. 
    stdlib Use the C standard library RNG. 
    mt Use the C++11 implementation of the Mersenne twister (mt19937); only available with C++11 support. 
    pcg32 Use the 32 bit version of the Permuted Congruential Generator.[3] 
    xo128 Use the Xoshiro128++ RNG.[4] 
createset If specified, create a 1D data set filled with random numbers of the specified type. 
    < name > Name of created set. 
    count <#> The number of elements to put into the set. 
    settype {int|float01|gauss} Type of numbers to use; integer, floating point between 0 and 1, Gaussian distribution. 52 mean Mean of distribution for 'gauss'. sd Standard deviation of distribution for 'gauss'. seed <#> Optional seed for the RNG.

This command can be used to set the default random number generator used in CPPTRAJ, and/or create a 1D data set filled with random values.