invloglikelihood_snn.m

来自「神经网络的工具箱, 神经网络的工具箱,」· M 代码 · 共 26 行

function [yl, yu] = invloglikelihood_snn(y_av, e_max)
%INVLOGLIKELIHOOD_SNN the inverse of the loglikelihood error.
%
% Syntax
%
%  [yl, yu] = invloglikelihood_snn(y_av, err)
%
% Description
%
%  INVLOGLIKELIHOOD_SNN takes
%   y_av     - error is around y_av
%   err      - loglikelihood error
%  and returns
%   yl       - lowest y for which loglikelihood_snn(y, y_av) = err
%   yu       - highest y for which loglikelihood_snn(y, y_av) = err
%  
% See also
%
%   LOGLIKELIHOOD_SNN
%


tmp = sqrt(2*e_max);
yu = y_av./(1-tmp+1/3*tmp.^2-1/36*tmp.^3-1/270*tmp.^4); 
yl = y_av./(1+tmp+1/3*tmp.^2+1/36*tmp.^3-1/270*tmp.^4);