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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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% LCPSD implement cross-power-spectral density estimation on a log frequency axis. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DESCRIPTION: LCPSD implement cross-power-spectral density estimation on a % log frequency axis % % CALL: b = lcpsd(a1,a2,pl) % % INPUTS: aN - input analysis objects (two) % pl - input parameter list % % OUTPUTS: b - output analysis object % % <a href="matlab:utils.helper.displayMethodInfo('ao', 'lcpsd')">Parameters Description</a> % % VERSION: $Id: lcpsd.m,v 1.29 2011/04/08 08:56:13 hewitson Exp $ % % References: "Improved spectrum estimation from digitized time series % on a logarithmic frequency axis", Michael Troebs, Gerhard Heinzel, % Measurement 39 (2006) 120-129. % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% function varargout = lcpsd(varargin) % Check if this is a call for parameters if utils.helper.isinfocall(varargin{:}) varargout{1} = getInfo(varargin{3}); return end import utils.const.* utils.helper.msg(msg.PROC3, 'running %s/%s', mfilename('class'), mfilename); if nargout == 0 error('### lcpsd cannot be used as a modifier. Please give an output variable.'); end % Collect input variable names in_names = cell(size(varargin)); for ii = 1:nargin,in_names{ii} = inputname(ii);end % Collect all AOs [as, ao_invars] = utils.helper.collect_objects(varargin(:), 'ao', in_names); % Apply defaults to plist pl = applyDefaults(getDefaultPlist, varargin{:}); % Throw an error if input is not two AOs if numel(as) ~= 2 error('### lcpsd only accepts two inputs AOs.'); end % Compute cross-spectrum with lxspec bs = ao.lxspec(as, pl, 'cpsd', getInfo, ao_invars); % Set output varargout{1} = bs; end %-------------------------------------------------------------------------- % Get Info Object %-------------------------------------------------------------------------- function ii = getInfo(varargin) if nargin == 1 && strcmpi(varargin{1}, 'None') sets = {}; pl = []; else sets = {'Default'}; pl = getDefaultPlist(); end % Build info object ii = minfo(mfilename, 'ao', 'ltpda', utils.const.categories.sigproc, '$Id: lcpsd.m,v 1.29 2011/04/08 08:56:13 hewitson Exp $', sets, pl); ii.setModifier(false); ii.setArgsmin(2); end %-------------------------------------------------------------------------- % Get Default Plist %-------------------------------------------------------------------------- function plout = getDefaultPlist() persistent pl; if ~exist('pl', 'var') || isempty(pl) pl = buildplist(); end plout = pl; end function pl = buildplist() % General plist for Welch-based, log-scale spaced spectral estimators pl = plist.LPSD_PLIST; end