matlab画各种概率分布图像.doc

《matlab画各种概率分布图像.doc》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、Matlab画各种概率分布函数曲线helpPDFPDFDensityfunctionforaspecifieddistribution.Y=PDF(NAME,X,A)returnsanarrayofvaluesoftheprobabilitydensityfunctionfortheone-parameterprobabilitydistributionspecifiedbyNAMEwithparametervaluesA,evaluatedatthevaluesinX.Y=PDF(NAME,X,A,B)orY=PDF(NAME,X,A,B,C)return

2、svaluesoftheprobabilitydensityfunctionforatwo-orthree-parameterprobabilitydistributionwithparametervaluesA,B(andC).ThesizeofYisthecommonsizeoftheinputarguments.Ascalarinputfunctionsasaconstantmatrixofthesamesizeastheotherinputs.EachelementofYcontainstheprobabilitydensityevaluatedat

3、thecorrespondingelementsoftheinputs.Acceptablestringsfornameare:·'beta'(Betadistribution)·'bino'(Binomialdistribution)二项分布·'chi2'(Chi-squaredistribution)卡方分布·'exp'(Exponentialdistribution)指数分布·'ev'(Extremevaluedistribution)极值分布·'f'(Fdistribution)费雪分布·'gam'(Gammadistribution)伽马分布·'g

4、ev'(Generalizedextremevaluedistribution)·'gp'(GeneralizedParetodistribution)极值分布函数·'geo'(Geometricdistribution)几何分布·'hyge'(Hypergeometricdistribution)超几何分布·'logn'(Lognormaldistribution)对数正态分布·'nbin'(Negativebinomialdistribution)负二项分布·'ncf'(NoncentralFdistribution)非中心F分布·'nct'(Nonce

5、ntraltdistribution)非中心t分布·'ncx2'(Noncentralchi-squaredistribution)非中心卡方分布·'norm'(Normaldistribution)正态分布·'poiss'(Poissondistribution)泊松分布·'rayl'(Rayleighdistribution)瑞利分布·'t'(tdistribution)t分布·'unif'(Uniformdistribution)均匀分布·'unid'(Discreteuniformdistribution)离散均匀分布·'wbl'(Weibulldi

6、stribution)韦伯分布