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function scaleout = fn_imcerrgraph(imf,firstl,firsth,nvar,imstp,xlab,ylab,indxGimfml,xTick,indx_num)
% scaleout = fn_imcerrgraph(imf,firstl,firsth,nvar,imstp,xlab,ylab,indxGimfml,xTick)
% imcerrgraph: impulse, c (column: shock 1 to N), 1 error band, graph
%
% imf: imstp-by-nvar^2 matrix of impulse responses. Column (responses to 1st shock, responses to 2nd shock
% etc), Row (impusle steps),
% firstl: lower band
% highth: high band
% nvar: number of variables
% imstp: number of steps of impulse responses
% xlab,ylab: labels
% indxGimfml: 1, graph; 0, no graph
% xTick: optional. Eg: [12 24 36].
% indx_num: 0: no number on either axis (default), 1: number on both x-axis and y-axis.
%---------------
% scaleout: column 1 represents maximums; column 2 minimums. Rows: nvar variables.
%
% See fn_imcgraph, fn_imc2errgraph, imrerrgraph
%
% Copyright (C) 1997-2012 Tao Zha
%
% This 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.
%
% It 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.
%
% If you did not received a copy of the GNU General Public License
% with this software, see <http://www.gnu.org/licenses/>.
%
if nargin < 9, xTick = []; end
if nargin < 10, indx_num = 0; end
t = 1:imstp;
temp1=zeros(nvar,1);
temp2=zeros(nvar,1);
maxval=zeros(nvar,1);
minval=zeros(nvar,1);
for i = 1:nvar
for j = 1:nvar
temp1(j)=max(firsth(:,(j-1)*nvar+i));
temp2(j)=min(firstl(:,(j-1)*nvar+i));
end
maxval(i)=max(temp1);
minval(i)=min(temp2);
end
scaleout = [maxval(:) minval(:)];
%--------------
% Column j: Shock 1 to N; Row i: Responses to
%-------------
if indxGimfml
%figure
rowlabel = 1;
for i = 1:nvar
columnlabel = 1;
if minval(i)<0
if maxval(i)<=0
yt=[minval(i) 0];
else
yt=[minval(i) 0 maxval(i)];
end
else % (minval(i) >=0)
if maxval(i) > 0
yt=[0 maxval(i)];
else % (identically zero responses)
yt=[-1 0 1];
end
end
scale=[1 imstp minval(i) maxval(i)];
for j = 1:nvar
k1=(i-1)*nvar+j;
k2=(j-1)*nvar+i;
subplot(nvar,nvar,k1)
plot(t,imf(:,k2),t,[firstl(:,k2) firsth(:,k2)],'--',...
t,zeros(length(imf(:,k2)),1),'-');
set(gca,'XTick',xTick)
set(gca,'YTick',yt)
grid
axis(scale); % put limits on both axes.
%set(gca,'YLim',[minval(i) maxval(i)])
if (indx_num==0) % no numbers on axes
set(gca,'XTickLabel',' ');
set(gca,'YTickLabel',' ');
% elseif (indx_num==1) %numbers on x-axis.
% if i<nvar
% set(gca,'XTickLabelMode','manual','XTickLabel',[])
% end
else % put numbers on both axes
if i<nvar
set(gca,'XTickLabelMode','manual','XTickLabel',[])
end
if j>1
set(gca,'YTickLabel',' ');
end
end
if rowlabel == 1
%title(['x' num2str(j)])
%title(eval(['x' num2str(j)]))
title(char(xlab(j)))
end
if columnlabel == 1
%ylabel(['x' num2str(i)])
%ylabel(eval(['x' num2str(i)]))
ylabel(char(ylab(i)))
end
columnlabel = 0;
end
rowlabel = 0;
end
end
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