#N canvas 0 0 604 511 12; #X floatatom 113 218 5 0 0 0 - - -; #X obj 123 113 f; #X obj 104 198 random 4; #X obj 26 197 random 2; #X floatatom 35 219 5 0 0 0 - - -; #X obj 123 138 t b b f; #X obj 26 253 sel 0 1; #X obj 159 328 +; #X obj 123 87 metro 100; #X obj 123 65 tgl 15 0 empty empty empty 0 -6 0 8 -262144 -1 -1 1 1 ; #X obj 104 252 + 1; #X floatatom 242 153 5 0 0 0 - - -; #X obj 82 309 *; #X msg 26 282 -1; #X obj 242 83 moses 0; #X obj 316 83 moses 100; #X obj 242 107 * -1; #X obj 407 86 * -1; #X obj 407 111 + 200; #X msg 60 282 1; #X text 39 9 Random walk generator; #X text 143 64 on/off; #X text 298 152 output; #X text 22 375 A random walk is a special case of a Markov chain \, in which the states are integers and the transitions add or subtract a small amount from the previous state to get a new one. Here the "f" holds the state. When it gets a bang \, the previous state is added to a random number (from 1 to 4) multiplied by a random sign (-1 or 1). The new value is then coerced into the range from 0 to 100; #X text 35 235 sign; #X text 113 234 magnitude; #X text 203 313 add prev value; #X text 200 330 to random increment; #X text 256 30 coercion to range 0-100 \; if out of range \, reflect ; #X text 255 60 us back in.; #X text 323 492 updated for Pd version 0.37-1; #X connect 1 0 5 0; #X connect 2 0 0 0; #X connect 2 0 10 0; #X connect 3 0 4 0; #X connect 3 0 6 0; #X connect 5 0 3 0; #X connect 5 1 2 0; #X connect 5 2 7 1; #X connect 6 0 13 0; #X connect 6 1 19 0; #X connect 7 0 14 0; #X connect 8 0 1 0; #X connect 9 0 8 0; #X connect 10 0 12 1; #X connect 11 0 1 1; #X connect 12 0 7 0; #X connect 13 0 12 0; #X connect 14 0 16 0; #X connect 14 1 15 0; #X connect 15 0 11 0; #X connect 15 1 17 0; #X connect 16 0 11 0; #X connect 17 0 18 0; #X connect 18 0 11 0; #X connect 19 0 12 0;