postpad.m

来自「linear time－frequency toolbox」· M 代码 · 共 26 行

function x = postpad (x, L)
%POSTPAD   Pads or truncates a vector x to a specified length L.
%
%   This is a simpler version of the file distributed with octave.
%   The function does not check input parameters.


xl=size(x,1);

if xl==L
  % Do nothing, bails out as quickly as possible.
  return;
end;

xw=size(x,2);

if ndims(x)>2
  error('Postpad of multidim not done yet.');
end;

if xl<L
  x=[x; zeros(L-xl,xw)];
else
  x=x(1:L,:);
end;