Density Estimation(Parametric Approach)
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Parametric Approach
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P(Y|X)=P(X|Y)P(Y)/P(X)
P(Y):easy. Experience or training data.P(X|Y):difficult. Too few training data; high-dimensional feature space (computation,storage).Parametric Approach
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Form known
Parameters unknown
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Your first consulting job
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Bernoulli Distribution
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Maximum Likelihood Estimation
模式识别Ch5-Density Estimation
DensityEstimation(ParametricApproach)12ParametricApproach????P(Y|X)=P(X|Y)P(Y)/P(X)P(Y):easy.Experienceortrainingdata.P(X|Y):difficult.Toof
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