initgradw.m

来自「particle filter 粒子滤波器 matlab工具箱」· M 代码 · 共 36 行

function obj=initgradw(obj)
% Intializes the gradient with respect to w. Used by, for instance, the EKF filter.
% The result is found in the 'gradw' property.
%
% Syntax: (* = optional)
%
% obj = initgradw(obj);
%
% In arguments:
%
% 1. obj
%	Data object to be differentiated.
% Out arguments:
%
% 1. obj
%	Resulting object

% Toolbox for nonlinear filtering.
% Copyright (C) 2005  Jakob Ros閚 <[e-mail]>
%
% This program is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License
% as published by the Free Software Foundation; either version 2
% of the License, or (at your option) any later version.
%
% This program is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with this program; if not, write to the Free Software
% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

[obj.gradw_idxstart, obj.gradw_idxlength]=initgrad(obj,4);	% 4 means 'w'