?? iteratedsine.m
字號:
function w = IteratedSine(t)
% IteratedSine -- window for iterated sine cut-off function
% Usage
% w = IteratedSine(t)
% Inputs
% t abscissa values for window evaluation
% Outputs
% w sin(pi/4(1 + sin(pi t)))
% 1 if t > 1/2 and 0 if t < -1/2.
% See Also
% IteratedSineWindow, MakeSineWindow
%
% By Emmanuel Candes, 2003-2004
phase = 1 + sin(pi*t);
w = sin(pi/4 * phase);
t0 = find(t <= -1/2);
if length(t0) > 0,
w(t0) = zeros(1,length(t0));
end
t1 = find(t >= 1/2);
if length(t1) > 0,
w(t1) = ones(1,length(t1));
end
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