postpad2.m

来自「Matlab时频分析工具箱,希望能对大家有所帮助啊」· M 代码 · 共 43 行

function xo = postpad2(x, L1,L2)
%POSTPAD2  Pad or truncate matrix to specified size.
%  
%   Pads or truncates a matrix x to specified dims L1 and L2.
%
%   The function does not check input parameters.
%

% 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 3 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, see <http://www.gnu.org/licenses/>.

xs1=size(x,1);
xs2=size(x,2);

% Trap the do-nothing case.
if xs1==L1 && xs2==L2
  xo=x;
  return;
end;

xo=zeros(L1,L2);

% Minimum size along each dimension.
xm1=min(xs1,L1);
xm2=min(xs2,L2);

xo(1:xm1,1:xm2)=x(1:xm1,1:xm2);