/usr/share/puredata/doc/2.control.examples/20.weighted-random.pd is in puredata-doc 0.46.7-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | #N canvas 161 46 660 441 12;
#X msg 103 95 bang;
#X text 389 414 updated for Pd version 0.35;
#X text 44 19 You can generate weighted random numbers from uniformly
distributed ones. If you just want two possible outcomes with a varying
probability for each one \, you can do as shown:;
#X obj 103 121 random 100;
#X obj 102 174 bng 20 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X obj 169 174 bng 20 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X floatatom 205 148 3 0 100;
#X text 250 148 <-- change probablilty;
#X obj 103 149 moses 80;
#X text 152 93 <-- click to test;
#X text 61 219 This outputs a number at left 80% of the time \, otherwise
at right \, unless you override the "80" using the number box. You
may extend this to more than two possible outcomes \, for instance
like this:;
#X msg 106 305 bang;
#X obj 106 331 random 100;
#X obj 105 384 bng 20 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X obj 195 387 bng 20 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 155 303 <-- click to test;
#X obj 106 359 moses 10;
#X obj 196 360 moses 30;
#X obj 263 387 bng 20 250 50 0 empty empty empty 0 -6 0 8 -262144 -1
-1;
#X text 103 409 10%;
#X text 193 410 20%;
#X text 265 409 70%;
#X connect 0 0 3 0;
#X connect 3 0 8 0;
#X connect 6 0 8 1;
#X connect 8 0 4 0;
#X connect 8 1 5 0;
#X connect 11 0 12 0;
#X connect 12 0 16 0;
#X connect 16 0 13 0;
#X connect 16 1 17 0;
#X connect 17 0 14 0;
#X connect 17 1 18 0;
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