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{{alias}}( μ, σ[, options] )
Returns a readable stream for generating pseudorandom numbers drawn from a
lognormal distribution.
In addition to standard readable stream events, the returned stream emits a
'state' event after internally generating `siter` pseudorandom numbers,
which is useful when wanting to deterministically capture a stream's
underlying PRNG state.
Parameters
----------
μ: number
Location parameter.
σ: number
Scale parameter.
options: Object (optional)
Options.
options.objectMode: boolean (optional)
Specifies whether a stream should operate in "objectMode". Default:
false.
options.encoding: string|null (optional)
Specifies how Buffer objects should be decoded to strings. Default:
null.
options.highWaterMark: integer (optional)
Specifies the maximum number of bytes to store in an internal buffer
before ceasing to generate additional pseudorandom numbers.
options.sep: string (optional)
Separator used to join streamed data. This option is only applicable
when a stream is not in "objectMode". Default: '\n'.
options.iter: integer (optional)
Number of iterations.
options.prng: Function (optional)
Pseudorandom number generator (PRNG) for generating uniformly
distributed pseudorandom numbers on the interval `[0,1)`. If provided,
the `state` and `seed` options are ignored. In order to seed the
returned iterator, one must seed the provided `prng` (assuming the
provided `prng` is seedable).
options.seed: integer|ArrayLikeObject<integer> (optional)
Pseudorandom number generator seed. The seed may be either a positive
unsigned 32-bit integer or, for arbitrary length seeds, an array-like
object containing unsigned 32-bit integers.
options.state: Uint32Array (optional)
Pseudorandom number generator state. If provided, the `seed` option is
ignored.
options.copy: boolean (optional)
Boolean indicating whether to copy a provided pseudorandom number
generator state. Setting this option to `false` allows sharing state
between two or more pseudorandom number generators. Setting this option
to `true` ensures that a returned iterator has exclusive control over
its internal state. Default: true.
options.siter: integer (optional)
Number of iterations after which to emit the PRNG state. Default: 1e308.
Returns
-------
stream: ReadableStream
Readable stream.
stream.PRNG: Function
Underlying pseudorandom number generator.
stream.seed: Uint32Array|null
Pseudorandom number generator seed.
stream.seedLength: integer|null
Length of generator seed.
stream.state: Uint32Array|null
Generator state.
stream.stateLength: integer|null
Length of generator state.
stream.byteLength: integer|null
Size (in bytes) of generator state.
Examples
--------
> function fcn( chunk ) { console.log( chunk.toString() ); };
> var opts = { 'iter': 10 };
> var s = {{alias}}( 2.0, 5.0, opts );
> var o = {{alias:@stdlib/streams/node/inspect-sink}}( fcn );
> s.pipe( o );
{{alias}}.factory( [μ, σ, ][options] )
Returns a function for creating readable streams which generate pseudorandom
numbers drawn from a lognormal distribution.
If provided distribution parameters, the returned function returns readable
streams which generate pseudorandom numbers drawn from the specified
distribution.
If not provided distribution parameters, the returned function requires that
distribution parameters be provided at each invocation.
Parameters
----------
μ: number (optional)
Location parameter.
σ: number (optional)
Scale parameter.
options: Object (optional)
Options.
options.objectMode: boolean (optional)
Specifies whether a stream should operate in "objectMode". Default:
false.
options.encoding: string|null (optional)
Specifies how Buffer objects should be decoded to strings. Default:
null.
options.highWaterMark: integer (optional)
Specifies the maximum number of bytes to store in an internal buffer
before ceasing to generate additional pseudorandom numbers.
options.sep: string (optional)
Separator used to join streamed data. This option is only applicable
when a stream is not in "objectMode". Default: '\n'.
options.iter: integer (optional)
Number of iterations.
options.prng: Function (optional)
Pseudorandom number generator (PRNG) for generating uniformly
distributed pseudorandom numbers on the interval `[0,1)`. If provided,
the `state` and `seed` options are ignored. In order to seed the
returned iterator, one must seed the provided `prng` (assuming the
provided `prng` is seedable).
options.seed: integer|ArrayLikeObject<integer> (optional)
Pseudorandom number generator seed. The seed may be either a positive
unsigned 32-bit integer or, for arbitrary length seeds, an array-like
object containing unsigned 32-bit integers.
options.state: Uint32Array (optional)
Pseudorandom number generator state. If provided, the `seed` option is
ignored.
options.copy: boolean (optional)
Boolean indicating whether to copy a provided pseudorandom number
generator state. Setting this option to `false` allows sharing state
between two or more pseudorandom number generators. Setting this option
to `true` ensures that a returned iterator has exclusive control over
its internal state. Default: true.
options.siter: integer (optional)
Number of iterations after which to emit the PRNG state. Default: 1e308.
Returns
-------
fcn: Function
Function for creating readable streams.
Examples
--------
> var opts = { 'objectMode': true, 'highWaterMark': 64 };
> var createStream = {{alias}}.factory( opts );
{{alias}}.objectMode( μ, σ[, options] )
Returns an "objectMode" readable stream for generating pseudorandom numbers
drawn from a lognormal distribution.
Parameters
----------
μ: number
Location parameter.
σ: number
Scale parameter.
options: Object (optional)
Options.
options.encoding: string|null (optional)
Specifies how Buffer objects should be decoded to strings. Default:
null.
options.highWaterMark: integer (optional)
Specifies the maximum number of objects to store in an internal buffer
before ceasing to generate additional pseudorandom numbers.
options.iter: integer (optional)
Number of iterations.
options.prng: Function (optional)
Pseudorandom number generator (PRNG) for generating uniformly
distributed pseudorandom numbers on the interval `[0,1)`. If provided,
the `state` and `seed` options are ignored. In order to seed the
returned iterator, one must seed the provided `prng` (assuming the
provided `prng` is seedable).
options.seed: integer|ArrayLikeObject<integer> (optional)
Pseudorandom number generator seed. The seed may be either a positive
unsigned 32-bit integer or, for arbitrary length seeds, an array-like
object containing unsigned 32-bit integers.
options.state: Uint32Array (optional)
Pseudorandom number generator state. If provided, the `seed` option is
ignored.
options.copy: boolean (optional)
Boolean indicating whether to copy a provided pseudorandom number
generator state. Setting this option to `false` allows sharing state
between two or more pseudorandom number generators. Setting this option
to `true` ensures that a returned iterator has exclusive control over
its internal state. Default: true.
options.siter: integer (optional)
Number of iterations after which to emit the PRNG state. Default: 1e308.
Returns
-------
stream: ReadableStream
Readable stream operating in "objectMode".
stream.PRNG: Function
Underlying pseudorandom number generator.
stream.seed: Uint32Array|null
Pseudorandom number generator seed.
stream.seedLength: integer|null
Length of generator seed.
stream.state: Uint32Array|null
Generator state.
stream.stateLength: integer|null
Length of generator state.
stream.byteLength: integer|null
Size (in bytes) of generator state.
Examples
--------
> function fcn( v ) { console.log( v ); };
> var opts = { 'iter': 10 };
> var s = {{alias}}.objectMode( 2.0, 5.0, opts );
> var o = {{alias:@stdlib/streams/node/inspect-sink}}.objectMode( fcn );
> s.pipe( o );
See Also
--------