-add file to read JSON gui perfect-foresight

matlab/+gui/+perfect-foresight/read.m

+function di_perfect_foresight()
+
+	global M_ options_ oo_ ys0_ ex0_
+
+	%remove this instruction when proper path is found
+	addpath jsonlab-1.5
+
+	disp('di_perfect_foresight performing Matlab tasks')
+
+	%loading JSON
+	jm = loadjson('perforin.JSON','SimplifyCell',0);
+	runflag=1;
+	data2json=struct();
+
+	%We test if jsonload loads string or char
+	% jsl=length(class(jm.jsontest{1,1}));
+
+	% INITVAL instructions
+	%we initialize exogenous shocks to zero and compute initial ss
+	options_.initval_file = 0;
+	for nexo = 1:jm.exonum
+		oo_.exo_steady_state( nexo ) = 0;
+	end
+	if M_.exo_nbr > 0
+		oo_.exo_simul = ones(M_.maximum_lag,1)*oo_.exo_steady_state';
+	end
+	if M_.exo_det_nbr > 0
+		oo_.exo_det_simul = ones(M_.maximum_lag,1)*oo_.exo_det_steady_state';
+	end
+	steady;
+	data2json.steady_state1=oo_.steady_state;
+
+
+	% ENDVAL instructions
+	%we initialize exogenous shocks to zero and compute final ss unless there is a permanent shock
+	ys0_= oo_.steady_state;
+	ex0_ = oo_.exo_steady_state;
+	if jm.permanentshockexist==0
+		for nexo = 1:jm.exonum
+				oo_.exo_steady_state( nexo ) = 0;
+		end
+	else
+		for exoiter = 1:length(jm.permanentshocksdescription)
+			currentshock=jm.permanentshocksdescription(exoiter);
+			oo_.exo_steady_state(currentshock{1}.shockindex+1) = currentshock{1}.shockvalue;
+			if (currentshock{1}.shockstartperiod)>1
+				%in case the permanent shock does not start at the initial period, we add a shocks block to mask the unnecessary periods
+				M_.det_shocks = [ M_.det_shocks;struct('exo_det',0,'exo_id',(currentshock{1}.shockindex+1),'multiplicative',0,'periods',1:(currentshock{1}.shockstartperiod-1),'value',0.0) ];
+			end
+		end
+	end
+	steady;
+	savedpermanentSS=oo_.steady_state;
+	data2json.steady_state2=oo_.steady_state;
+
+
+	if jm.transitoryshockexist==1
+		% SHOCKS instructions (for transitory shocks)
+		for exotriter = 1:length(jm.shocksdescription)
+			currenttrshock=jm.shocksdescription(exotriter);
+			% disp(currenttrshock{1}.shockname);
+			% disp(class(currenttrshock{1}.shockstartperiod));
+			M_.det_shocks = [ M_.det_shocks;struct('exo_det',0,'exo_id',(currenttrshock{1}.shockindex+1),'multiplicative',0,'periods',currenttrshock{1}.shockstartperiod:currenttrshock{1}.shockendperiod,'value',currenttrshock{1}.shockvalue) ];
+			%oo_.exo_steady_state(str2num(currentshock{1}.shockindex)+1) = currentshock{1}.shockvalue;
+		end
+		M_.exo_det_length = 0;
+	end
+
+	if ((jm.nonanticipatedshockexist==1) || (jm.delayexist==1))
+
+		nonanticip=jm.nonanticipmatrix;
+		rowindex=1;
+		firstsimul=0;
+		permanentnonanticip=0;
+
+		while nonanticip{rowindex}{1}>0
+
+			currentperiod=nonanticip{rowindex}{1};
+
+			if currentperiod==1
+				%there are nonanticipated shocks to add at first period
+				if nonanticip{rowindex}{4}==0
+					%this is a current nonanticipated shock
+					M_.det_shocks = [ M_.det_shocks;struct('exo_det',0,'exo_id',(nonanticip{rowindex}{2}+1),'multiplicative',0,'periods',1:1,'value',nonanticip{rowindex}{7}) ];
+				else
+					%this is a delayed nonanticipated shock
+					M_.det_shocks = [ M_.det_shocks;struct('exo_det',0,'exo_id',(nonanticip{rowindex}{2}+1),'multiplicative',0,'periods',(nonanticip{rowindex}{5}):(nonanticip{rowindex}{6}),'value',nonanticip{rowindex}{7}) ];
+				end
+				if nonanticip{rowindex+1}{1}~=currentperiod
+					%when we have tracked all first period shocks we can simulate
+					options_.periods = jm.simperiods;
+					yy=oo_.steady_state;
+					perfect_foresight_setup;
+					[rowexo,colexo]=size(oo_.exo_simul);
+					perfect_foresight_solver;
+
+					if nonanticip{rowindex+1}{1}>0
+						%we collect all the path from ooendo period 1 to just before the next shock...
+						yy=[yy,oo_.endo_simul(:,2:(2+(nonanticip{rowindex+1}{1}-currentperiod-1)))];
+					else
+						%... or if there are no more shocks we collect the whole path
+						yy=[yy,oo_.endo_simul(:,2:end)];
+					end
+
+					ooexosaved=oo_.exo_simul;
+					firstsimul=1;
+				end
+			else
+				%currentperiod is larger than one: we first perform perfect foresight simulation with initial period 1 conditions
+				if firstsimul==0
+					%Initializing the first simulation
+					options_.periods = jm.simperiods;
+					yy=oo_.steady_state;
+					perfect_foresight_setup;
+					[rowexo,colexo]=size(oo_.exo_simul);
+					perfect_foresight_solver;
+
+					%In this because there is at least one shock we did not consider yet in the first period, we only save the path from the beginning up the period just before the current
+					yy=[yy,oo_.endo_simul(:,2:currentperiod)];
+					ooexosaved=oo_.exo_simul;
+					firstsimul=1;
+				end
+
+
+
+				if nonanticip{rowindex}{3}==1
+					%this is a permanent shock
+					oo_.exo_steady_state((nonanticip{rowindex}{2}+1)) = nonanticip{rowindex}{7};
+					steady;
+					savedpermanentSS=oo_.steady_state;
+					data2json.steady_state2=oo_.steady_state;
+					permanentnonanticip=1;
+
+					if nonanticip{rowindex}{4}==0
+						%this is a current permanent nonanticipated shock
+						ooexosaved((currentperiod+1):end,(nonanticip{rowindex}{2}+1))=nonanticip{rowindex}{7};
+					else
+						%this is a delayed permanent nonanticipated shock
+						ooexosaved((nonanticip{rowindex}{5}+1):end,(nonanticip{rowindex}{2}+1))=nonanticip{rowindex}{7};
+					end
+
+				else
+					%this is not a permanent shock
+					%we add new shocks in the saved timepath with original time indexes
+					if nonanticip{rowindex}{4}==0
+						%this is a single current nonanticipated shock
+						ooexosaved(currentperiod+1,(nonanticip{rowindex}{2}+1))=nonanticip{rowindex}{7};
+						%oo_.exo_simul(2,(nonanticip{rowindex}{2}+1))=nonanticip{rowindex}{7};
+					else
+						%this is a delayed nonanticipated shock
+						ooexosaved((nonanticip{rowindex}{5}+1):(nonanticip{rowindex}{6}+1),(nonanticip{rowindex}{2}+1))=nonanticip{rowindex}{7};
+						%oo_.exo_simul((nonanticip{rowindex}{5}+1):(nonanticip{rowindex}{6}+1),(nonanticip{rowindex}{2}+1))=nonanticip{rowindex}{7};
+					end
+				end
+
+				%we copy only the necessary window in oo_.exo_simul
+				%oo_.exo_simul=ooexosaved((currentperiod+1):end,:);
+				oo_.exo_simul=[zeros(1,colexo);ooexosaved((currentperiod+1):end,:)];
+
+				[ooexolength,dummy]=size(oo_.exo_simul);
+				%we fill oo_.exo_simul until it has the correct size depending on of there are permanent shocks or not
+				if jm.permanentshockexist==1
+					%if there is a permanent shock we fill with last value of ooexosaved
+					%oo_.exo_simul((length(ooexosaved((currentperiod+1):end,:))+1):rowexo,:)=ones(rowexo-(length(ooexosaved((currentperiod+1):end,:))+1)+1,1)*ooexosaved(end,:);
+					%oo_.exo_simul((ooexolength+1):rowexo,:)=ones(rowexo-ooexolength,1)*ooexosaved(end,:);
+					oo_.exo_simul=[oo_.exo_simul;ones(rowexo-ooexolength,1)*ooexosaved(end,:)];
+				else
+					%otherwise we fill with zeros
+					%oo_.exo_simul((length(ooexosaved((currentperiod+1):end,:))+1):rowexo,:)=zeros(rowexo-(length(ooexosaved((currentperiod+1):end,:))+1)+1,colexo);
+					%oo_.exo_simul((ooexolength+1):rowexo,:)=zeros(rowexo-ooexolength,colexo);
+					oo_.exo_simul=[oo_.exo_simul;zeros(rowexo-ooexolength,colexo)];
+				end
+
+				if nonanticip{rowindex+1}{1}~=currentperiod
+					%when we have tracked all the non-anticipated/delayed shocks for the current period, we can simulate
+
+
+					if jm.permanentshockexist==1
+						%if there are permanent shocks we fill oo_.endo with finalSS
+						oo_.endo_simul=savedpermanentSS*ones(1,options_.periods+2);
+					else
+						%no permanent shocks we fill oo_.endo with initialSS
+						oo_.endo_simul=oo_.steady_state*ones(1,options_.periods+2);
+					end
+
+					%we need to change oo_.endo_simul first value that gives the initial state of the economy
+					oo_.endo_simul(:,1)=yy(:,end);
+
+
+					perfect_foresight_solver;
+
+					if nonanticip{rowindex+1}{1}>0
+						%we collect all the path from ooendo period 1 to just before the next shock...
+						yy=[yy,oo_.endo_simul(:,2:(2+(nonanticip{rowindex+1}{1}-currentperiod-1)))]
+					else
+						%... or if there are no more shocks we collect the whole path
+						yy=[yy,oo_.endo_simul(:,2:end)];
+					end
+				end
+
+			end
+
+			rowindex=rowindex+1;
+		end %	while jm.nonanticipmatrix{rowindex}{1}>0
+
+		%we copy the endo path back
+		oo_.endo_simul=yy;
+
+	else
+		%if there are no unanticipated shocks we perform the simulation
+		options_.periods = jm.simperiods;
+		perfect_foresight_setup;
+		perfect_foresight_solver;
+	end
+
+
+	plotlgt=length(oo_.endo_simul);
+	data2json.endosimul_length=plotlgt;
+	data2json.endo_names=char(M_.endo_names);
+	data2json.endo_nbr=M_.endo_nbr;
+	for nendo = 1:M_.endo_nbr
+		data2json.endo_simul.(strtrim(char(M_.endo_names(nendo,:))))=oo_.endo_simul(nendo,:);
+	end
+	data2json.endo_simul.plotx=[0:1:plotlgt];
+	savejson('',data2json,'perforout.JSON');
+
+return;