istarget.m

data description toolbox 1.6 单类分类器工具包

%ISTARGET true if the label is target
%
%   I = ISTARGET(A)
%
% Returns true for the objects from dataset A which are labeled
% 'target'.
%
%   I = ISTARGET(LABA)
%
% It also works when no dataset but a label matrix given
%
% See also: isocset, gendatoc, oc_set

% Copyright: D.M.J. Tax, [e-mail]
% Faculty EWI, Delft University of Technology
% P.O. Box 5031, 2600 GA Delft, The Netherlands

function I = istarget(a)

% Check that we are dealing with a one-class dataset
if ~isocset(a)
	%warning('Dataset is not a one-class dataset');
end
if isdataset(a)
	[nlab,lablist] = getnlab(a);
elseif isa(a,'char')
	[nlab,lablist] = renumlab(a);
else
	error('I cannot handle input variable A');
end

% first find the target objects:
nr_t = strmatch('target',lablist);
if isempty(nr_t)
	if nargout==1
		warning('dd_tools:NoTargetPresent',...
			'Cannot find target objects in dataset.');
	end
	I = zeros(size(nlab,1),1);
else
	I = (nlab==nr_t);
end

return