Random Number
Generator of normally distributed random numbers.
blockType: RandomNumber
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Path in the library: |
Description
The Random Number block generates normally distributed random numbers. To generate uniformly distributed random numbers, use block Uniform Random Number. Both blocks use a normal (Gaussian) random number generator.
The generated sequence can be repeated if you use the Random Number block with the same non-negative starting number and parameters. The initial value is reset to the specified value each time the simulation starts. By default, the block generates a sequence with mean 0 and variance 1. To generate a vector of random numbers with the same mean and variance, set the parameter Seed as a vector.
Avoid integrating the random signal because solvers must integrate relatively smooth signals. Instead, use the block Band-Limited White Noise.
The numerical parameters of this block must have the same dimensionality (after expanding the scalars).
Ports
Output
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OUT_1
—
output signal
scalar | vector | matrix
Details
The output signal, which is the generated random numbers that fall into a normal distribution. The output sequence is uniquely determined by the initial number.
| Data types |
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| Complex numbers support |
No |
Parameters
Main
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Mean —
mean value of random numbers
Scalar / array of real numbers
Details
Sets the average value of the generated random numbers.
| Default value |
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| Program usage name |
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| Tunable |
Yes |
| Evaluatable |
Yes |
#
Variance —
random number variance
Scalar / array of real numbers
Details
Sets the variance of the generated random numbers.
| Default value |
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| Program usage name |
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| Tunable |
Yes |
| Evaluatable |
Yes |
#
Seed —
initial number
Scalar / array of Int64
Details
The starting number for the random number generator.
The output sequence is uniquely determined by the starting number.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |
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Sample time —
interval between calculation steps
SampleTime (real number / vector of two real numbers)
Details
Specify the interval between calculation steps as a non-negative number. To inherit a calculation step, set this parameters to -1.
By default the value is 0.1, which corresponds to the default calculation step of the block Band-Limited White Noise.
| Default value |
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| Program usage name |
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| Tunable |
No |
| Evaluatable |
Yes |