Pbeta random values that follow a Eulerian Beta Distribution

superclass: Pattern

Pbeta(lo, hi, prob1, prob2, length)

lo, hi lower and upper boundary of values (default: 0.0 and 1.0)

prob1 The probability that a value will occur near lo. <1, probability of a value near lo

increases. =1, uniform dist. >1 will create a bounded Gaussian-like distribution.

prob2 The probability that a value will occur near hi. <1, probability of a value near lo

increases. =1, uniform dist. >1 will create a bounded Gaussian-like distribution.

length number of values produced  (default: inf)

// example

(

var a, c, w;

a = Pbeta(0.0, 1.0, 0.1, 0.1, inf);

c = a.asStream.nextN(500);

w = Window.new("Pbetarand", Rect(10, 10, 540, 800));

// plot the values

c.plot(bounds: Rect(10, 10, 520, 380), discrete: true, parent: w);

// a histogram of the values

c.histo(500).plot(bounds: Rect(10, 410, 520, 380), parent: w);

)

(

var a, c, w;

a = Pbeta(0.0, 1.0, 1, 1, inf);

c = a.asStream.nextN(500);

w = Window.new("Pbetarand", Rect(10, 10, 540, 800));

// plot the values

c.plot(bounds: Rect(10, 10, 520, 380), discrete: true, parent: w);

// a histogram of the values

c.histo(500).plot(bounds: Rect(10, 410, 520, 380), parent: w);(discrete: true);

)

(

var a, c, w;

a = Pbeta(0.0, 1.0, 3, 3, inf);

c = a.asStream.nextN(500);

w = Window.new("Pbetarand", Rect(10, 10, 540, 800));

// plot the values

c.plot(bounds: Rect(10, 10, 520, 380), discrete: true, parent: w);

// a histogram of the values

c.histo(500).plot(bounds: Rect(10, 410, 520, 380), parent: w);

)

// sound example

(

SynthDef(\help_sinegrain, 

{ arg out=0, freq=440, sustain=0.05;

var env;

env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction:2);

Out.ar(out, SinOsc.ar(freq, 0, env))

}).add;

)

(

var a;

a = Pbeta(0.0, 1.0, 0.1, 0.1, inf).asStream;

{

loop {

Synth(\help_sinegrain, [\freq, a.next * 600 + 300]);

0.02.wait;

}

}.fork;

)

(

var a;

a = Pbeta(0.0, 1.0, 1.0, 1.0, inf).asStream;

{

loop {

Synth(\help_sinegrain, [\freq, a.next * 600 + 300]);

0.02.wait;

}

}.fork;

)

(

var a;

a = Pbeta(0.0, 1.0, 3.0, 3.0, inf).asStream;

{

loop {

Synth(\help_sinegrain, [\freq, a.next * 600 + 300]);

0.02.wait;

}

}.fork;

)