impulse.m

Univ. of Calgary CREWS的免费地震研究软件

function imp=impulse(v,n)

% imp=impulse(v,n)
% imp=impulse(v)
%
% returns a row vector of the same length as v which is zero 
% except at sample n where it is 1.0. n defaults to length(v)/2
%
% v= input signal vector used to determine the length
%    of the impulse vector.
% n= position of impulse vector ( default = length(v)/2 )
%
% by G.F. Margrave, May 1991
% 
% NOTE: It is illegal for you to use this software for a purpose other
% than non-profit education or research UNLESS you are employed by a CREWES
% Project sponsor. By using this software, you are agreeing to the terms
% detailed in this software's Matlab source file.
 
% BEGIN TERMS OF USE LICENSE
%
% This SOFTWARE is maintained by the CREWES Project at the Department
% of Geology and Geophysics of the University of Calgary, Calgary,
% Alberta, Canada.  The copyright and ownership is jointly held by 
% its author (identified above) and the CREWES Project.  The CREWES 
% project may be contacted via email at:  [e-mail]
% 
% The term 'SOFTWARE' refers to the Matlab source code, translations to
% any other computer language, or object code
%
% Terms of use of this SOFTWARE
%
% 1) Use of this SOFTWARE by any for-profit commercial organization is
%    expressly forbidden unless said organization is a CREWES Project
%    Sponsor.
%
% 2) A CREWES Project sponsor may use this SOFTWARE under the terms of the 
%    CREWES Project Sponsorship agreement.
%
% 3) A student or employee of a non-profit educational institution may 
%    use this SOFTWARE subject to the following terms and conditions:
%    - this SOFTWARE is for teaching or research purposes only.
%    - this SOFTWARE may be distributed to other students or researchers 
%      provided that these license terms are included.
%    - reselling the SOFTWARE, or including it or any portion of it, in any
%      software that will be resold is expressly forbidden.
%    - transfering the SOFTWARE in any form to a commercial firm or any 
%      other for-profit organization is expressly forbidden.
%
% END TERMS OF USE LICENSE

if length(v)==1, v=zeros(1,v); end
 if nargin==1
   n=round(length(v)/2);
 end

 if n>length(v)
   error(' n cannot be greater than length of vector')
 end
 imp=zeros(size(v));
 imp(n)=1.0;