Analysis and Application Research on Nonparametric Density Estimation

Density function estimation was applied in resource investigation,analysis and comparison of some nonparametric density estimation methods made.The affect of density curve smoothing with application nonparametric kernel density estimation method and the smoothing Bootstrap method of bandwidth selection principle was studied.The Matlab software was used to simulate and complement the data analysis on ecological agriculture risk investment policy.Three bandwidths h1=0.3,h2=1.3,h3=2.3 were chosen.Optimal bandwidth h=0.67 was determined for more precise density function estimation.Nonparametric density estimation may be applied in practice in practice in practice in all kinds of environments.overcoming the difficult of density function type unknown in resource investigation.