jifen.m

一种新的时频分析方法的matlab源程序。

function h=jifen(x,dt)

% The function JIFEN performs a point wise integration of x(1,n).
%
% Input-
%	x	- column vector data x(1,n)
%	dt	- the true delta t
% Output-
%	h	- raw vector data h(n,1) of integrated values
%
% Calling sequence-
% h=jifen(x,dt)
%
% See also-
% 	INTEGR: both process one vector, but in a different form. 
 
% Z.Shen (JHU)				March, 1996 Initial
% J.Marshak (NASA GSFC)		March 10, 2004 Modified
%	            (replaced 'h(1)=x(1);' by 'h(1)=0;' ). 

%----- Get dimensions
n=max(size(x));

%----- Initialize
h=zeros(n,1);
%h(1)=x(1);
h(1)=0; % (JM)

%----- Integrate
for j=2:n
    h(j)=h(j-1)+(x(j)+x(j-1))/2.*dt;
end