postpad2.m

linear time－frequency toolbox

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.
%

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);