kernel_reduce_truncate.m

高斯滤波器 matlab toolbox For GMMs and Gaussian kernels

function g = kernel_reduce_truncate(g,N)

if size(g.x,2) <= N, return, end

[dmy, i] = sort(-g.w); % minus to give descending order
i = i(1:N);
g.x = g.x(:,i);
g.w = g.w(i);