plrandd: Random number generator returning a real random number in the range [0,1]

`plrandd`: Random number generator returning a real random number in the range [0,1]
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#### `plrandd`: Random number generator returning a real random number in the range [0,1]

`plrandd (` | `)`;

Random number generator returning a real random number in the range [0,1]. The generator is based on the Mersenne Twister. Most languages / compilers provide their own random number generator, and so this is provided purely for convenience and to give a consistent random number generator across all languages supported by PLplot. This is particularly useful for comparing results from the test suite of examples.

Redacted form: `plrandd()`

This function is used in examples 17 and 21.

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