Added method firstobservedperiod.

Returns the first period without NaNs.

Closes #15
parent f3544c6a
function d = firstobservedperiod(o) % --*-- Unitary tests --*--
% Returns the first period where all the variables are observed (first period without NaNs).
%
% INPUTS
% - o [dseries] with N variables and T periods.
%
% OUTPUTS
% - b [dates] First period where the N variables are observed (without NaNs).
% Copyright (C) 2016 Dynare Team
%
% This file is part of Dynare.
%
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
b = ~isnan(o);
c = find(prod(b, 2));
d = o.firstdate+(c(1)-1);
%@test:1
%$ try
%$ ts = dseries([NaN, NaN; NaN, 1; 2, 2; 3, 3; 4, NaN; 5, 5]);
%$ dd = ts.firstobservedperiod();
%$ t(1) = true;
%$ catch
%$ t(1) = false;
%$ end
%$
%$ if t(1)
%$ t(2) = isequal(dd, dates('3Y'));
%$ end
%$
%$ T = all(t);
%@eof:1
%@test:2
%$ try
%$ ts = dseries([0, 0; NaN, 1; 2, 2; 3, 3; 4, NaN; 5, 5]);
%$ dd = ts.firstobservedperiod();
%$ t(1) = true;
%$ catch
%$ t(1) = false;
%$ end
%$
%$ if t(1)
%$ t(2) = isequal(dd, dates('1Y'));
%$ end
%$
%$ T = all(t);
%@eof:2
function b = isnan(o)
% Returns an array of logicals (true/false). Element (t,i) is true iff the i-th variable at
% period number t is not a NaN.
%
% INPUTS
% - o [dseries] with N variables and T periods.
%
% OUTPUTS
% - b [logical] T*N array of logicals.
% Copyright (C) 2016 Dynare Team
%
% This file is part of Dynare.
%
% Dynare is free software: you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation, either version 3 of the License, or
% (at your option) any later version.
%
% Dynare is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
% GNU General Public License for more details.
%
% You should have received a copy of the GNU General Public License
% along with Dynare. If not, see <http://www.gnu.org/licenses/>.
b = isnan(o.data);
\ No newline at end of file
......@@ -90,7 +90,7 @@ switch S(1).type
case 'freq'
% Returns an integer characterizing the data frequency (1, 4, 12 or 52)
B = A.dates.freq;
case {'lag','lead','hptrend','hpcycle','chain','detrend','exist','mean','std','center'} % Methods with less than two arguments.
case {'lag','lead','hptrend','hpcycle','chain','detrend','exist','mean','std','center','firstobservedperiod'} % Methods with less than two arguments.
if length(S)>1 && isequal(S(2).type,'()')
if isempty(S(2).subs)
B = feval(S(1).subs,A);
......
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