Commit 2b6074a7 authored by Stéphane Adjemian's avatar Stéphane Adjemian
Browse files

Added lineartrend method.

parent a8ab984b
function trend = lineartrend(o) % --*-- Unitary tests --*--
% Returns a trend centered on zero.
%
% INPUTS
% - o [dseries] time series with T observations.
%
% OUTPUTS
% - trend [double] T*1 vector, linear trend with mean zero.
%
% REMARKS
% the generic element of the returned argument is trend(i) = i - (n+1)/2.
% Copyright (C) 2017 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/>.
trend = transpose(1:o.nobs)-.5*(o.nobs+1);
return
%@test:1
a = dseries(randn(100,3));
try
trend = o.lineartrend;
t(1) = 1;
catch
t(1) = 0;
end
if t(1)
t(2) = abs(mean(trend))<1e-12;
end
T = all(t);
%@eof:1
\ No newline at end of file
......@@ -70,7 +70,7 @@ switch S(1).type
error(['dseries::subsref: ' S(1).subs ' is not a method but a member!'])
end
B = builtin('subsref', A, S(1));
case {'log','log_','exp','exp_','ygrowth','ygrowth_','qgrowth','qgrowth_','ydiff','ydiff_','qdiff','qdiff_','abs','abs_','isnan','firstdate','firstobservedperiod','lastobservedperiod'} % Give "dot access" to public methods without args.
case {'log','log_','exp','exp_','ygrowth','ygrowth_','qgrowth','qgrowth_','ydiff','ydiff_','qdiff','qdiff_','abs','abs_','isnan','firstdate','firstobservedperiod','lastobservedperiod','lineartrend'} % Give "dot access" to public methods without args.
B = feval(S(1).subs,A);
if length(S)>1 && isequal(S(2).type,'()') && isempty(S(2).subs)
S = shiftS(S,1);
......
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