HelpSource/Classes/Pmeanrand.schelp

   1 class:: Pmeanrand
   2 summary:: random values that tend toward ((lo + hi) / 2)
   3 related:: Classes/Plprand, Classes/Phprand
   4 categories:: Streams-Patterns-Events>Patterns>Random
   5
   6 ClassMethods::
   7
   8 method::new
   9
  10 argument::lo
  11 lower boundary of values.
  12
  13 argument::hi
  14 upper boundary of values.
  15
  16 argument::length
  17 number of values produced.
  18
  19 Examples::
  20
  21 code::
  22 (
  23 var a, c, w;
  24 a = Pmeanrand(0.0, 1.0, inf);
  25 c = a.asStream.nextN(500);
  26 w = Window.new("Pmeanrand", Rect(10, 10, 540, 800));
  27 // plot the values
  28 c.plot(bounds: Rect(10, 10, 520, 380), discrete: true, parent: w);
  29 // a histogram of the values
  30 c.histo(500).plot(bounds: Rect(10, 410, 520, 380), parent: w);)
  31
  32
  33 // sound example
  34 (
  35 SynthDef(\help_sinegrain,
  36         { arg out=0, freq=440, sustain=0.05;
  37                 var env;
  38                 env = EnvGen.kr(Env.perc(0.01, sustain, 0.2), doneAction:2);
  39                 Out.ar(out, SinOsc.ar(freq, 0, env))
  40         }).add;
  41 )
  42
  43 (
  44 var a;
  45 a = Pmeanrand(0.0, 1.0, inf).asStream;
  46 {
  47         loop {
  48                 Synth(\help_sinegrain, [\freq, a.next * 600 + 300]);
  49                 0.02.wait;
  50         }
  51 }.fork;
  52 )
  53
  54 // this is equivalent to:
  55 (
  56 {
  57         loop {
  58                 Synth(\help_sinegrain, [\freq, (rrand(0.0, 1.0) + rrand(0.0, 1.0) * 0.5) * 600 + 300]);
  59                 0.02.wait;
  60         }
  61 }.fork;
  62 )
  63 ::