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view m-toolbox/classes/@specwin/win_levelledhanning.m @ 24:056f8e1e995e database-connection-manager
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author | Daniele Nicolodi <nicolodi@science.unitn.it> |
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date | Mon, 05 Dec 2011 16:20:06 +0100 |
parents | f0afece42f48 |
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% WIN_LEVELLEDHANNING returns Hanning window, with N points and levelCoef levelling order % If mode == 'define', the window values will be empty and all the features % If mode == 'build', the window values will be calculated % % A Grynagier 03/01/2010 % % $Id: win_levelledhanning.m,v 1.1 2011/05/24 16:23:21 mauro Exp $ % function varargout = win_levelledhanning(w, mode, N, levelCoef) switch lower(mode) case 'build' n_args = nargin; if n_args < 3 N = w.len; end if n_args < 4 levelCoef = w.levelorder; end % Calculate the values of the window z = (1:N)./(N+1); v = 0.5 * (1 - cos(2*pi*z)); for jj = 1:levelCoef v = v.*(2-v); end varargout{1} = v/norm(v)*length(v)^0.5; case 'define' % Make window struct w.type = 'levelledHanning'; w.len = N; w.levelorder = levelCoef; w.skip = 0; varargout{1} = w; end % END