view examples/puredata/subband_mean.pd @ 214:f28f66faa016

Add "stateful" feature type with initial feature "last n"

Stateful feature extraction functions are functions that require state to be maintained between successive calls.  This is necessary, for example when an accumulation of values is required, or changes need to be measured over time.

The initial xtract_last_n() function accumulates the last N (single) values from *data and writes them to *result

#N canvas 493 51 587 478 10;
#X obj 82 127 xtract~ spectrum;
#N canvas 6 48 450 300 mag_spectrum 0;
#X obj 260 64 block~ 512;
#N canvas 0 0 450 300 (subpatch) 0;
#X array mag_spectrum 512 float 3;
#A 0 0.0132486 0.0096563 0.0354424 0.0165249 0.0339139 0.0245265 0.0429209
0.0604935 0.0858024 0.472867 0.131911 0.0710302 0.0320982 0.0389981
0.0272274 0.015468 0.0195354 0.0195954 0.0188111 0.0207361 0.0166347
0.00157469 0.02206 0.0104267 0.0070746 0.0295359 0.0121162 0.013655
0.0102867 0.00591679 0.00586671 0.00641669 0.0105255 0.0120749 0.00294434
0.013461 0.00875645 0.0157844 0.00649163 0.0150134 0.0135169 0.0191429
0.0282347 0.0241475 0.0185751 0.00689928 0.022662 0.00670788 0.00318354
0.00283897 0.0142583 0.017543 0.00907015 0.0164521 0.0223336 0.02503
0.0121266 0.0170551 0.0284856 0.0271476 0.00775067 0.00155745 0.0197414
0.0150477 0.0279912 0.0224467 0.00407337 0.00497963 0.000851764 0.0161942
0.0176389 0.0160251 0.0175218 0.027366 0.00792114 0.0222662 0.0160268
0.0279591 0.0112953 0.00409087 0.00645786 0.015363 0.0293401 0.0105894
0.00844756 0.0175758 0.0215718 0.0200431 0.00260135 0.0101493 0.0200218
0.00456712 0.0278158 0.0215603 0.0262786 0.0129843 0.00468684 0.024167
0.0149199 0.0101847 0.00482173 0.00959639 0.0325585 0.0291854 0.0138181
0.0169087 0.0236841 0.0291382 0.0199014 0.00511631 0.00370711 0.0101142
0.0120038 0.00115485 0.0154999 0.00297503 0.0140602 0.0191407 0.0210018
0.0322096 0.0224205 0.0206845 0.0191659 0.031921 0.0151202 0.0168541
0.036274 0.0229901 0.0349309 0.0208622 0.0131437 0.00933729 0.0126362
0.025394 0.00901058 0.01157 0.0131736 0.00677092 0.0194996 0.0173273
0.00325973 0.0124627 0.0110635 0.0167556 0.0136908 0.0065692 0.0262649
0.0225311 0.0235114 0.0197293 0.00282572 0.0240237 0.00657686 0.0173891
0.0257314 0.012755 0.0217556 0.00329426 0.0158449 0.0240496 0.0106366
0.022061 0.00708543 0.0209552 0.00957124 0.0102439 0.016452 0.00943987
0.0137701 0.0165189 0.0184722 0.0335198 0.023159 0.0140537 0.0137668
0.0249716 0.0252517 0.0222753 0.0196876 0.00917165 0.0231789 0.0223262
0.0130253 0.0143873 0.0174217 0.0262216 0.0221904 0.00554891 0.0169622
0.0214176 0.00636145 0.0190085 0.00084364 0.00991013 0.00538487 0.0132557
0.034742 0.00783582 0.0329481 0.00777087 0.0132578 0.0246518 0.00381398
0.0136186 0.0101923 0.0105305 0.0135506 0.00659576 0.00948354 0.0244682
0.00372209 0.0144119 0.00303586 0.0193436 0.0127196 0.0248709 0.0018994
0.0102549 0.00929058 0.0222578 0.0290115 0.0211259 0.0397477 0.0200812
0.0044044 0.0132484 0.0407253 0.00666307 0.0303175 0.014019 0.00897817
0.00528597 0.0267464 0.014286 0.0215917 0.0260188 0.0217563 0.00233073
0.01223 0.0020918 0.00739707 0.00231818 0.0237471 0.0197745 0.0138808
0.00300929 0.0166336 0.0104104 0.0131831 0.00639908 0.00556837 0.0145624
0.00884734 0.023722 0.0139918 0.0214095 0.0136722 0.0246529 0.0212282
0.0214965 0.0114811 0.0181338 0.0193226 0.0165735 0.0138509 0.0193118
0.00444871 0.0119447 0.00337634 0.0148758 0.0187246 0.0244031 0.010354
0.0146917 0.0135728 0.0135919 0.0270935 0.00721325 0.0254225 0.0171227
0.0239136 0.00854048 0.00875449 0.0127878 0.0253363 0.0114877 0.0122164
0.0159164 0.0182439 0.0100041 0.00461047 0.0245388 0.0189458 0.00619877
0.0248993 0.00963699 0.0249874 0.0271515 0.0145729 0.0279523 0.027924
0.0220959 0.0262779 0.015607 0.00716239 0.012087 0.0337037 0.00516229
0.0170121 0.0336761 0.00650737 0.00497518 0.02043 0.0105242 0.00488026
0.0104467 0.00818958 0.00628406 0.0211596 0.0165034 0.0182923 0.0199196
0.0249672 0.0164662 0.0214767 0.0120562 0.0322599 0.00383154 0.00921745
0.00146418 0.0356547 0.0103786 0.0165492 0.0304809 0.0131255 0.0167945
0.00558382 0.0238359 0.0175395 0.00780578 0.0346175 0.00236843 0.0255091
0.0201751 0.0108775 0.0210824 0.0209226 0.0320313 0.0437274 0.00560051
0.0344518 0.00791858 0.0208586 0.0286015 0.0248276 0.0237304 0.0412748
0.0120705 0.0241371 0.00511147 0.0317298 0.0139929 0.028099 0.0103861
0.00891256 0.00822179 0.016315 0.0248265 0.0213948 0.0239172 0.0166187
0.0310473 0.0186244 0.0166212 0.0366136 0.0136573 0.0269544 0.010431
0.0249531 0.0120786 0.0109345 0.0123368 0.0151866 0.0357349 0.00463059
0.0118539 0.00970646 0.00946582 0.00969734 0.00891857 0.00890028 0.0202631
0.0215117 0.0111571 0.0250767 0.0209911 0.0198019 0.0093692 0.0131443
0.00748891 0.024563 0.0247875 0.0230017 0.00794473 0.00888343 0.0217427
0.0343637 0.0287685 0.00968487 0.0498302 0.0171984 0.0315536 0.00588345
0.010743 0.0126087 0.0182915 0.00907374 0.00443379 0.0379275 0.023097
0.0160588 0.00775962 0.0344518 0.0164484 0.0376125 0.0172285 0.0132559
0.029612 0.0116543 0.0273187 0.023721 0.0046918 0.0172711 0.00766218
0.0112108 0.0180092 0.0278611 0.0190289 0.0202484 0.0127141 0.0276473
0.0169104 0.028993 0.00897726 0.00712007 0.0122292 0.00820719 0.0168334
0.00864513 0.0127985 0.0237389 0.0120437 0.0212306 0.0304613 0.0189116
0.0197339 0.0212744 0.0151605 0.0141882 0.0195768 0.00291933 0.0358095
0.0293726 0.0169182 0.0103468 0.0135299 0.0266578 0.0154398 0.00245885
0.00794718 0.0127344 0.0298125 0.00820393 0.00626316 0.0170656 0.0230811
0.00259497 0.0173437 0.00922873 0.0205893 0.0209727 0.00431716 0.00870416
0.00315811 0.0163018 0.0292532 0.0154488 0.0141043 0.0250745 0.00961138
0.0142033 0.010861 0.0187522 0.0241866 0.016184 0.0184565 0.0162928
0.011523 0.0141778 0.0157446 0.0228784 0.0380396 0.0176535 0.0102128
0.0272628 0.0115185 0.0148983 0.0233291 0.00915212 0.0157429 0.0298723
101.909;
#X coords 0 1 511 0 200 140 1;
#X restore 125 121 graph;
#X restore 245 43 pd mag_spectrum;
#X obj 82 162 tabsend~ mag_spectrum;
#X obj 244 15 block~ 1024;
#X obj 279 224 tabreceive~ mag_spectrum;
#X obj 58 71 noise~;
#X obj 113 70 osc~ 440;
#X obj 278 307 print~;
#X obj 453 188 loadbang;
#X obj 278 266 xtract~ subbands 1024;
#X obj 118 230 bng 15 250 50 0 empty empty empty 17 7 0 10 -262144
-1 -1;
#X msg 453 223 list 0 8 0 16;
#X connect 0 0 2 0;
#X connect 4 0 9 0;
#X connect 5 0 0 0;
#X connect 6 0 0 0;
#X connect 8 0 11 0;
#X connect 9 0 7 0;
#X connect 10 0 7 0;
#X connect 11 0 9 1;