www.gusucode.com > signal 工具箱matlab源码程序 > signal/+dspopts/abstractspectrumwfreqpointsMCOS.m
classdef (CaseInsensitiveProperties=true, TruncatedProperties=true) abstractspectrumwfreqpointsMCOS < dspopts.abstractspectrumMCOS & sigio.dyproputil & hgsetget
%dspopts.abstractspectrumwfreqpoints class
% dspopts.abstractspectrumwfreqpoints extends dspopts.abstractspectrum.
%
% dspopts.abstractspectrumwfreqpoints properties:
% NormalizedFrequency - Property is of type 'bool'
% Fs - Property is of type 'mxArray'
% CenterDC - Property is of type 'mxArray'
% FreqPoints - Property is of type 'psdFreqPointsType enumeration: {'All','User Defined'}'
%
% dspopts.abstractspectrumwfreqpoints methods:
% calcnfft - Get the numeric value of NFFT even when it's set to a string.
% copyTheObj - Copy this object
% loadobj - Load this object.
% saveobj - Save this object.
% set_freqpoints - PreSet function for the 'freqpoints' property.
% set_frequencyvector - PreSet function for the 'FrequencyVector' property.
% set_nfft - PreSet function for the 'nfft' property.
properties (SetObservable, GetObservable)
%FREQPOINTS Property is of type 'psdFreqPointsType enumeration: {'All','User Defined'}'
FreqPoints = 'All';
end
methods
function set.FreqPoints(obj,value)
% Enumerated DataType = 'psdFreqPointsType enumeration: {'All','User Defined'}'
value = validatestring(value,{'All','User Defined'},'','FreqPoints');
obj.FreqPoints = set_freqpoints(obj,value);
end
end % set and get functions
methods %% public methods
function nfft = calcnfft(hopts,segLen)
%CALCNFFT Get the numeric value of NFFT even when it's set to a string.
freqpoints = hopts.FreqPoints;
switch lower(freqpoints),
case 'all',
nfft = hopts.NFFT;
if ischar(nfft),
switch lower(nfft),
case 'nextpow2',
nfft = max(256,2^nextpow2(segLen)); % segLen=input length for all but welch.
case 'auto',
nfft = max(256,segLen);
end
end
case 'user defined',
nfft = hopts.frequencyvector;
if ischar(nfft),
switch lower(nfft),
case 'auto',
nfft = max(256,segLen);
end
Fs = hopts.Fs;
if ischar(Fs)
if strcmp(Fs, 'Normalized')
Fs = 2*pi;
end
end
range = 'whole';
if ishalfnyqinterval(hopts),
range = 'half';
end
nfft = psdfreqvec('npts',nfft, 'Fs',Fs, 'Range',range);
end
end
% [EOF]
end
function Hcopy = copyTheObj(this)
%COPY Copy this object
% OUT = COPY(ARGS) <long description>
Hcopy = loadobj(this);
% [EOF]
end
function s = saveobj(this)
%SAVEOBJ Save this object.
% OUT = SAVEOBJ(ARGS) <long description>
s.class = class(this);
% Save all of the public properties.
s = setstructfields(s, get(this));
% [EOF]
end
function freqpoints = set_freqpoints(this, freqpoints)
%SET_freqpoints PreSet function for the 'freqpoints' property.
% FreqPoints takes an enum type of {'All', 'User Defined'}
% A choice of 'All' dynamicall creates 'nfft' field
% A choice of 'User Defined' sets up 'FrequencyVector' field
validStrs = {'All','User Defined'};
if isnumeric(freqpoints),
error(message('signal:dspopts:abstractspectrumwfreqpoints:set_freqpoints:invalidFreqPointsValue', 'FreqPoints', 'FreqPoints', validStrs{ 1 }, validStrs{ 2 }));
else
idx = [];
for k=1:length(validStrs),
if regexp(lower(validStrs{k}),['^',lower(freqpoints)],'once');
idx=k;
end
end
if isempty(idx),
error(message('signal:dspopts:abstractspectrumwfreqpoints:set_freqpoints:invalidFreqPointsValue', 'FreqPoints', 'FreqPoints', validStrs{ 1 }, validStrs{ 2 }));
else
% Use full string with correct capitalization.
if (idx==1)
p = this.findprop('FrequencyVector');
if ~isempty(p)
% Remove the property.
delete(p);
end
if ~isprop(this,'NFFT'),
h = this.addprop('NFFT');
h.SetObservable = true;
h.GetObservable = true;
addlistener(this,'NFFT','PostSet',@(s,e)set_nfft(this));
end
this.NFFT = 'Nextpow2';
elseif (idx==2)
p = this.findprop('NFFT');
if ~isempty(p)
% Remove the property.
delete(p);
end
if ~isprop(this,'FrequencyVector'),
h = this.addprop('FrequencyVector');
h.SetObservable = true;
h.GetObservable = true;
addlistener(this,'FrequencyVector','PostSet',@(s,e)set_frequencyvector(this));
end
this.FrequencyVector = 'Auto';
else
error(message('signal:dspopts:abstractspectrumwfreqpoints:set_freqpoints:invalidFreqPointsValue', 'FreqPoints', 'FreqPoints', validStrs{ 1 }, validStrs{ 2 }));
end
end
end
end
function FrequencyVector = set_frequencyvector(this, FrequencyVector) %#ok
%SET_FREQUENCYVECTOR PreSet function for the 'FrequencyVector' property.
% Welch uses segment length instead of input length.
% auto = max(256,inputlength)
validStrs = {'Auto'};
FrequencyVector = this.FrequencyVector;
if ~isnumeric(FrequencyVector),
idx = [];
for k=1:length(validStrs),
if regexp(lower(validStrs{k}),['^',lower(FrequencyVector)],'once');
idx=k;
end
end
if isempty(idx),
error(message('signal:dspopts:abstractspectrumwfreqpoints:set_frequencyvector:invalidFrequencyVectorValue', 'FrequencyVector', 'FrequencyVector', validStrs{ 1 }));
end
end
% [EOF]
end
function nfft = set_nfft(this, nfft) %#ok
%SET_NFFT PreSet function for the 'nfft' property.
% Welch uses segment length instead of input length.
% nextpow2 = max(256,nextpow2(inputlength))
% auto = max(256,inputlength)
validStrs = {'Auto','Nextpow2'};
nfft = this.NFFT;
if isnumeric(nfft),
if ~isscalar(nfft) || nfft<=0 || rem(nfft,1),
error(message('signal:dspopts:abstractspectrumwfreqpoints:set_nfft:invalidNFFTValue', 'NFFT', 'NFFT', validStrs{ 1 }, validStrs{ 2 }));
end
else
idx = [];
for k=1:length(validStrs),
if regexp(lower(validStrs{k}),['^',lower(nfft)],'once');
idx=k;
end
end
if isempty(idx),
error(message('signal:dspopts:abstractspectrumwfreqpoints:set_nfft:invalidNFFTValue', 'NFFT', 'NFFT', validStrs{ 1 }, validStrs{ 2 }));
end
end
% [EOF]
end
function varargout = set(obj,varargin)
[varargout{1:nargout}] = signal.internal.signalset(obj,varargin{:});
end
function values = getAllowedStringValues(~,prop)
% This function gives the the valid string values for object properties.
switch prop
case 'FreqPoints'
values = {...
'All'
'User Defined'};
otherwise
values = {};
end
end
end %% public methods
methods (Static) %% static methods
function this = loadobj(s)
%LOADOBJ Load this object.
% OUT = LOADOBJ(ARGS) <long description>
this = feval(s.class);
% Set FreqPoints first
set(this, 'FreqPoints', s.FreqPoints);
f = fieldnames(get(this));
indx = strmatch('FreqPoints',f);
f(indx) = [];
for indx = 1:length(f)
set(this, f{indx}, s.(f{indx}));
end
end
end %% static methods
end % classdef