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% STK_PLOT_PREDVSOBS plots predictions against observations
%
% CALL: H = stk_plot_predvsobs (Z_OBS, Z_PRED, ...)
%
% CALL: H = stk_plot_predvsobs (H_AXES, Z_OBS, Z_PRED, ...)
%
% See also stk_predict_leaveoneout, stk_example_kb10
% Copyright Notice
%
% Copyright (C) 2016 CentraleSupelec
%
% Author: Julien Bect <julien.bect@centralesupelec.fr>
% Copying Permission Statement
%
% This file is part of
%
% STK: a Small (Matlab/Octave) Toolbox for Kriging
% (https://github.com/stk-kriging/stk/)
%
% STK 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.
%
% STK 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 STK. If not, see <http://www.gnu.org/licenses/>.
function h = stk_plot_predvsobs (varargin)
[h_axes, varargin, n_argin] = stk_plot_getaxesarg (varargin{:});
if n_argin >= 2
y = varargin{1};
y_pred = varargin{2};
opts = varargin(3:end);
else
stk_error ('Not enough input arguments.', 'NotEnoughInputArgs');
end
% Extract numerical predictions
try
y_pred = y_pred.mean;
catch
y_pred = double (y_pred);
end
% Plot prediction versus truth
h.data = plot (h_axes, y, y_pred, 'kd'); hold on;
% Plot "reference" line y_LOO = y
h.refline = plot (h_axes, xlim, xlim, 'r--'); hold off;
% Apply options
if ~ isempty (opts)
set (h.data, opts{:});
end
% Create labels
h_labels = stk_labels (h_axes, 'observations', 'predictions');
h.xlabel = h_labels(1);
h.ylabel = h_labels(2);
end % function
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