% FFT overloads the fft method for Analysis objects.%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% DESCRIPTION: FFT overloads the fft operator for Analysis objects.%% CALL: b = fft(a, pl)%% PARAMETERS: 'type' - plain, one or two sided fft [default: 'plain']%% <a href="matlab:utils.helper.displayMethodInfo('ao', 'fft')">Parameters Description</a>%% VERSION: $Id: fft.m,v 1.50 2011/04/28 21:31:31 mauro Exp $%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%function varargout = fft(varargin) % Check if this is a call for parameters if utils.helper.isinfocall(varargin{:}) varargout{1} = getInfo(varargin{3}); return end import utils.const.* utils.helper.msg(msg.PROC3, 'running %s/%s', mfilename('class'), mfilename); % Collect input variable names in_names = cell(size(varargin)); for ii = 1:nargin,in_names{ii} = inputname(ii);end % Collect all AOs [as, ao_invars] = utils.helper.collect_objects(varargin(:), 'ao', in_names); % Decide on a deep copy or a modify bs = copy(as, nargout); % Apply defaults to plist pl = applyDefaults(getDefaultPlist, varargin{:}); % two-sided or one? type = find(pl, 'type'); % scale? scale = utils.prog.yes2true(find(pl, 'scale')); % Check input analysis object for jj = 1:numel(bs) % call core method of the fft bs(jj).fft_core(type); % scale if desired if scale bs(jj) = bs(jj)./ao(plist('vals',as(jj).fs,'yunits','Hz')); end % set name bs(jj).name = sprintf('fft(%s)', ao_invars{jj}); % Add history bs(jj).addHistory(getInfo('None'), pl, ao_invars(jj), bs(jj).hist); end % Set output varargout = utils.helper.setoutputs(nargout, bs);end%--------------------------------------------------------------------------% Get Info Object%--------------------------------------------------------------------------function ii = getInfo(varargin) if nargin == 1 && strcmpi(varargin{1}, 'None') sets = {}; pl = []; else sets = {'Default'}; pl = getDefaultPlist(); end % Build info object ii = minfo(mfilename, 'ao', 'ltpda', utils.const.categories.sigproc, '$Id: fft.m,v 1.50 2011/04/28 21:31:31 mauro Exp $', sets, pl);end%--------------------------------------------------------------------------% Get Default Plist%--------------------------------------------------------------------------function plout = getDefaultPlist() persistent pl; if ~exist('pl', 'var') || isempty(pl) pl = buildplist(); end plout = pl; endfunction plo = buildplist() plo = plist(); % FFT Type p = plist({'type', 'The fft type. Plain (complete non-symmetric), One-sided (from zero to Nyquist) or two-sided (complete symmetric).'}, {2, {'plain', 'one', 'two'}, paramValue.SINGLE}); plo.append(p); % Scale by sample rate? p = param({'scale',['set to ''true'' to scale FFT by sampling rate to match '... 'amplitude in continuous domain. Only applicable to time-series AOs.']},... paramValue.FALSE_TRUE); plo.append(p);end