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ȥԡ (entropy) Ȥɤ褯ʹ褦ˤʤäȤδϢǡγǰˤ뤳ȤϤޤʤܥ֥Ǥϡ#838. ηϤȥȥԡ ([2011-08-13-1]) ϤȤơ##838,1089,1090,1587,1693 γƵǤѸ˿ƤޤŪŬѤȤϤʤä
ȥԡȤϡηϤȤƤٹ礤ɸǤ롥ǡ˰ͤ˻ФäƤ뤫ɽ魯٤ȸƤ褤ؤαѤϡGries (112) Ƥ롥
A simple measure for categorical data is relative entropy Hrel. Hrel is 1 when the levels of the relevant categorical variable are all equally frequent, and it is 0 when all data points have the same variable level. For categorical variables with n levels, Hrel is computed as shown in formula (16), in which pi corresponds to the frequency in percent of the i-th level of the variable:
Gries ϡ300Ĥ̾ˤ봧ʬۤȤƤ롥̵164㡤괧33㡤괧103Ȥä硤Hrel = 0.8556091 ȤʤꡤʤԶѼʬۤȤˤʤ롥
ۤ˻Ф礬ˤʤ륱Ϥȹͤ뤳ȤǤ롥㤨Сܸνи٤ƥȡʤΥˤ˱ưͤݤ¬ȤȤǤ
ޤ˰۷ֻ֤ǧˡ줾Ѱ۷ (variants) ʬۤѰ줫ԶѰ줫¬뤳ȤʤɤǤ롥Τ褦ѰۤХȥԡƱΰۤʤƥȡʥˤδ֤ǤɤΤ餤ۤʤΤ뤤ŪʴؿϡۤʤΥƥȡʥˤδ֤ǤɤΤ餤ۤʤΤҴŪ˳Τ뤳ȤǤɸಽ¾βˤꡤѰۤ1Ĥηؼ̤Ƥ椯硤ȥԡ뤳Ȥˤʤ롥
Ū˹ͤ뤿ˡ#1773. ich, everich, -lich ch ä ([2014-03-05-1]) Ǽ夲 ch æΥǡȤ褦ε Schlüter ˤ뽸̤ɽǤϡĶ (before V, before <h>, before C) ζ̤Ϥñ ME II--ME IV γƻ˸줿Ѱ۷ΥȡΤߤθ뤳Ȥˤ롥Ѱ۷γƻ Hrel ̤ɽ˼
| I | 1150--1250 (ME I) | 1250--1350 (ME II) | 1350--1420 (ME III) | 1420--1500 (ME IV) |
|---|---|---|---|---|
| ich | 853 | 589 | 7 | 0 |
| I | 33 | 503 | 1397 | 2612 |
| Hrel | 0.2295 | 0.9955 | 0.04531 | 0.0000 |
| EVERY | 1150--1250 (ME I) | 1250--1350 (ME II) | 1350--1420 (ME III) | 1420--1500 (ME IV) |
| everich | - | 12 | 10 | 9 |
| everiche | - | 12 | 3 | 0 |
| every | - | 5 | 112 | 152 |
| Hrel | - | 0.9406 | 0.3550 | 0.1962 |
| -LY | 1150--1250 (ME I) | 1250--1350 (ME II) | 1350--1420 (ME III) | 1420--1500 (ME IV) |
| -lich | 106 | 33 | 31 | 3 |
| -''liche' | 689 | 168 | 70 | 44 |
| -ly | 12 | 19 | 1088 | 1444 |
| Hrel | 0.4225 | 0.6390 | 0.3123 | 0.1342 |

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