function?h?=?condentropy（xy）

if?~（isvector（x）?&&?isvector（y））????%xy?must?be?one-dimensional?vectors
????disp（‘Error:?input?data?must?be?one?dimensional?vectors‘）
????h?=?nan;

elseif?size（x）~=size（y）?%vectors?must?have?the?same?size
????disp（‘Error:?input?vectors?must?have?the?same?size‘）
????h?=?nan;
else
????valuesX?=?unique（x）;????%different?values?found?in?vector?x
????valuesY?=?unique（y）;????%different?values?found?in?vector?y
????
????numValues?=?numel（x）;???%number?of?elements?contained?on?each?vector
????h?=?0;??%initial?value?of?conditional?entropy
????
????for?i?=?valuesX‘??%for?each?different?value?found?in?x
????????
????????iOcurrences?=?find（x==i）;???%ocurrences?in?x?being?i
????????numOcurrences?=?numel（iOcurrences）;?%number?of?ocurrences?in?x?being?i
????????pi?=?numOcurrences?/?numValues;??%probability?p（i）
????????
????????for?j?=?valuesY‘???%for?each?different?value?found?in?y
????????????jOcurrences?=?numel（find（y（iOcurrences）==j））;???%ocurrences?in?subset?of?y?being?j
????????????if?jOcurrences?>?0??%if?there?where?at?at?least?one?ocurrence
????????????????pjcondi?=?jOcurrences?/?numOcurrences;??%partial?conditional?entropy?for?specific?values?of?x?and?y
????????????????h?=?h?-?pi*pjcondi*log10（pjcondi）;???%cumulative?of?partial?conditional?entropies
????????????end
????????end?
????end
end

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????3951??2014-05-03?17:37??main.m

?????文件????????774??2014-05-02?16:25??pos.m

?????文件????????246??2014-05-02?06:13??weight.m

?????文件???????1366??2014-05-02?16:13??condentropy.m

?????文件????????245??2014-05-02?01:46??DistinguishMatrix.m

?????文件?????????93??2014-05-02?16:13??gama.m

?????文件????????317??2014-05-02?03:04??GetCore.m

?????文件????????901??2014-05-01?22:52??ind.m

-----------?---------??----------?-----??----

?????????????????7893????????????????????8