Random number generators

There are two random number generators, providing uniformly and standard normally distributed pseudo-random numbers. Note that these operands have special properties in data assignments. In particular, they are evaluated only as necessary.

Normally distributed random numbers

 

Usage

• nrand  operand.

This returns a standardised normal pseudo-random number with seed set by default or by a SEED:  command. The nrand  operand can act like an operator in some circumstances, for example when used in conjunction with the DATAVEC:  command.  

Uniformly distributed random numbers

 
Usage

• urand  operand.

This returns a uniform pseudo-random number with seed set by default or by a SEED:  command. The urand  operand can act like an operator in some circumstances, for example when used in conjunction with the DATAVEC:  command.