gusucode.com > 支持向量机工具箱 - LIBSVM OSU_SVM LS_SVM源码程序 > 支持向量机工具箱 - LIBSVM OSU_SVM LS_SVM\stprtool\generalp\acov.m
function [sigma]=acov(SIGMA,inx) % ACOV returns covariance matrix of given index. % [sigma]=acov(SIGMA,inx) % % This function returns inx-th covarinace matrix. % The matrix SIGMA contains a serie of L covariance matrices, % i.e, SIGMA = [sigma_1, sigma_2, ..., sigma_L] where sigma_i % is a matrix of size D-by-D. % % Input: % SIGMA [D x L ] covariance matrices. % inx [1x1] index of given covarince matrix, inx must be % from 1 to L. % % Output: % sigma [DxD] inx-thh covarince matrix. % % Statistical Pattern Recognition Toolbox, Vojtech Franc, Vaclav Hlavac % (c) Czech Technical University Prague, http://cmp.felk.cvut.cz % Modifications % 9-june-2001, V.Franc. dim = size(SIGMA,1); sigma = SIGMA(:,1+dim*(inx-1):inx*dim); return;