%SINVEST1 shows the parameters of a time series calculated by INVEST1
% only called by INVEST1

%       Version 2.99,      10 May 2002
%	Copyright (c) 1998-2002 by Alois Schloegl   <a.schloegl@ieee.org>	

% This library is free software; you can redistribute it and/or
% modify it under the terms of the GNU Library General Public
% License as published by the Free Software Foundation; either
% Version 2 of the License, or (at your option) any later version.
%
% This library 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
% Library General Public License for more details.
%
% You should have received a copy of the GNU Library General Public
% License along with this library; if not, write to the
% Free Software Foundation, Inc., 59 Temple Place - Suite 330,
% Boston, MA  02111-1307, USA.

Fs=flag_implicit_samplerate;
M=size(AutoCorr,2);
oo=M-1;
while 1,
        K=menu('Select','Autocovariance ACOVF','Autocorrelation ACF', ...
                'Partial ACF PACF','Coeff. of Determination Rē', ...
                'Error curve',...
                'Autoregressive Parameters',...
                'Information Criteria', ...
                'Matched Filter', ... 
                'Log PSD and Phase', ... 
                'Poles', ... 
                'Inverse Filtering', ... 
                'Spectra H(f,p)', ... 
                'Entropy H=ln(det(R))', ... 
                'Histogram of MOPS', ...
                'end');
        subplot(111);	  
        if K==1
                plot(0:M,AutoCov);
                title('Autocovariance function ACOVF(k)');
                xlabel('Lag k');
        elseif K==2
                if exist('OCTAVE_VERSION')==5             %%%%% Fuer OCTAVE 
                        plot(1:M,AutoCorr);
                elseif strcmp(version,'MIDEVA')           %%%%% fuer MatCom
                        plot(1:M,AutoCorr);
                else                                      %%%%% fuer Matlab
                        %               size(AutoCorr),size(ACFsd)]
                        %                errorbar(ones(nr,1)*(1:M),AutoCorr,ACFsd,ACFsd);
                        %               errorbar(1:M,AutoCorr,AutoCorr-ACFsd,AutoCorr+ACFsd);
                        plot(1:M,AutoCorr,'b',[1,M],[-1,1;-1,1]/sqrt(min(NC)),'b:');
                        if exist('OCTAVE_VERSION')<5
                                legend({'ACF','1/sqrt(N)'})
                        end;
                end;
                title('Autocorrelation function ACF(k)');
                xlabel('Lag k');
                
        elseif K==3
                %rc=ARPMX(:,(1:M).*(2:M+1)/2);
                %plot(1:M,PartACF);
                if size(ARPMX,2)==2*Pmax,
                        RC=ARPMX(:,Pmax+1:2*Pmax);
                else
                        RC=ARPMX(:,(1:M).*(2:M+1)/2);
                end;
                % according to http://www.itl.nist.gov/div898/handbook/pmc/section4/pmc4463.htm
                % is the 95% confidence interval 2/sqrt(N) 
                %plot(1:M,RC,'b',[1,M],[3,3;2,2;1,1;-1,-1;-2,-2;-3,-3]*(1/sqrt(min(NC))),'b:');
                %legend({'Part. ACF','1/sqrt(N)','2/sqrt(N) = 95% confidence interval','3/sqrt(N)'})
                plot(1:M,RC,'b',[1,M],[2,2;-2,-2]'*(1/sqrt(min(NC))),'b:');
                if exist('OCTAVE_VERSION')<5
                        legend({'Part. ACF','2/sqrt(N) = 95% confidence interval'})
                end;	
                title('Partial Autocorrelation function PACF(k)');
                xlabel('Lag k');
        elseif K==4
                plot(0:M,(E(1)-E)/E(1));
                title('Determination of Regression Rē=1-var{E}/var{Y}');
                xlabel('Model order p');
        elseif K==5
                plot(0:M,E,'r');
                if exist('OCTAVE_VERSION')<5
                        v=axis; v(3)=min([v(3); 0]); axis(v);
                end
                title('Mean Square (prediction) Error decrease with increasing model order');
                xlabel('Model order p');
        elseif K==6 
                plot(1:oo,ARPMX(:,oo/2*(oo-1)+(1:oo))','o-');
                title( ['AutoRegressive Parameters with model order' int2str(oo)])
        elseif K==7 
                while 1
                        K=menu('Select Criterion',...
                                'Final Predection Error FPE', ...
                                'Akaike Information Criterion AIC', ... 
                                'Bayesian Akaike Information Criterion BIC', ... 
                                'Schwartz''s Bayesian Crit. SBC (=MDL)', ... 
                                'Parzen''s CAT Criterion ', ... 
                                'PHI Criterion', ... 
                                'end');
                        
                        if K==1
                                tmp=min(2*optFPE+2,M);                           
                                oo=optFPE;
                                plot(0:tmp-1,FPE(1:tmp),'r',optFPE,FPE(optFPE+1),'ro');
                                if exist('OCTAVE_VERSION')<5
                                        text(optFPE,FPE(optFPE+1),sprintf('%i',optFPE));
                                        v=axis; v(3)=min([v(3); 0]); axis(v);
                                end;
                                title('Final Prediction Error FPE criterion');
                        elseif K==2 
                                tmp=min(2*optAIC+2,M);
                                oo=optAIC;
                                plot(0:tmp-1,AIC(1:tmp),'r',optAIC,AIC(optAIC+1),'ro');
                                if exist('OCTAVE_VERSION')<5
                                        text(optAIC,AIC(optAIC+1),sprintf('%i',optAIC));
                                        v=axis; v(3)=min([v(3); 0]); axis(v);
                                end;
                                title('Akaike''s Information Criterion AIC');
                        elseif K==3
                                tmp=min(2*optBIC+2,M);
                                oo=optBIC;
                                plot(0:tmp-1,BIC(1:tmp),'r',optBIC,BIC(optBIC+1),'ro');
                                if exist('OCTAVE_VERSION')<5
                                        text(optBIC,BIC(optBIC+1),sprintf('%i',optBIC));
                                        v=axis; v(3)=min([v(3); 0]); axis(v);
                                end;
                                title('Bayesian Akaike Information Criterion BIC');
                        elseif K==4
                                tmp=min(2*optSBC+2,M);
                                oo=optSBC;
                                plot(0:tmp-1,SBC(1:tmp),'r',optSBC,SBC(optSBC+1),'ro');
                                if exist('OCTAVE_VERSION')<5
                                        text(optSBC,SBC(optSBC+1),sprintf('%i',optSBC));
                                        v=axis; v(3)=min([v(3); 0]); axis(v);
                                end;
                                title('Schwartz''s Bayesian Criterion SBC');
                                %elseif K==5
                                %	tmp=min(2*optMDL,M);
                                %	oo=optMDL;
                                %	plot(0:tmp-1,MDL(1:tmp),'r',optMDL,MDL(optMDL+1),'ro');
                                %	v=axis; v(3)=min([v(3); 0]); axis(v);
                                %	text(optMDL,MDL(optMDL+1),sprintf('%i',optMDL))
                                %	title('Minimal Description length Criterion MDL');
                        elseif K==5
                                tmp=min(2*optCAT+2,M);
                                oo=optCAT;
                                plot(0:tmp-1,CATcrit(1:tmp),'r',optCAT,CATcrit(optCAT+1),'ro');
                                if exist('OCTAVE_VERSION')<5
                                        text(optCAT,CATcrit(optCAT+1),sprintf('%i',optCAT));
                                        v=axis; v(3)=min([v(3); 0]); axis(v);
                                end;
                                title('Parzen''s CAT Criterion ');
                        elseif K==6
                                tmp=min(2*optPHI+2,M);
                                oo=optPHI;
                                plot(0:tmp-1,PHI(1:tmp),'r',optPHI,PHI(optPHI+1),'ro');
                                if exist('OCTAVE_VERSION')<5
                                        text(optPHI,PHI(optPHI+1),sprintf('%i',optPHI));
                                        v=axis; v(3)=min([v(3); 0]); axis(v);
                                end;
                                title('Phi criterion ');   
                        elseif K==7
                                %[ARP,rc,res] =durlev(sum(AutoCov(:,1:(oo+1)),1));
                                ARP=ARPMX(:,oo/2*(oo-1)+(1:oo));
                                break;	
                        end;	%IF
                end;	%WHILE
        elseif K==8
                % if model order p is given then the filter parameters A are
                % A=[1; -earpyw(signal,p)]
                % inverse filtering is    invfiltsignal=filter(A,1,signal);
                
                h=zeros(nr,512)';
                w=zeros(nr,512)';
                for k=1:nr,
                        tmp=freqz(sqrt(E(k,oo+1)),[1 -ARPMX(k,oo/2*(oo-1)+(1:oo))],512);
                        h(:,k)=tmp(:);
                end
                
                plot((0:511)/512/2*Fs,abs(h));
                %plot((0:511)/512/2,abs(freqz(1,[1 -ARP]')));
                title('Matched Filter');
                xlabel('Frequency f');
                ylabel('|H(f)|');
        elseif K==9
                h=zeros(nr,512)';
                w=zeros(nr,512)';
                for k=1:nr,
                        tmp=freqz(sqrt(E(k,oo+1)),[1 -ARPMX(k,oo/2*(oo-1)+(1:oo))],512);
                        h(:,k)=tmp(:);
                end;        
                subplot(211);
                semilogy((0:511)/512/2*Fs,abs(h'))
                %semilogy((0:511)/512/2,abs(freqz(1,[1 -ARP]')))
                title('Logarithmic Spectral Density Fct.');
                subplot(212);
                plot((0:511)/512/2*Fs,angle(h)');
                %plot((0:511)/512/2,angle(freqz(1,[1 -ARP]')));
                ylabel('rad');
        elseif K==10           
                %	clf;
                %r = roots([1 -ARP]);
                r = roots([1 -ARPMX(:,oo/2*(oo-1)+(1:oo))]);
                t = 0:1/70:2*pi;
                plot(cos(t), sin(t), 'b:',real(r), imag(r), 'rx');
                
                %	zplane([],[1 -ARPmx(oo+1,1:oo)]);
                title('Pole Diagram');
                xlabel('real(z)');
                ylabel('imag(z)');
                
                MATLAB_VERSION = version;
                if MATLAB_VERSION(1)=='4'
                        ax = gca;
                        tmp = get(ax,'Aspect');
                        set(ax,'Aspect',[tmp(1),1]);
                elseif MATLAB_VERSION(1)=='5'
                        ax = gca;
                        tmp = get(ax,'DataAspectRatio');
                        set(ax,'PlotBoxAspectRatio',tmp);
                end;
        elseif K==11
                plot([Y(:) filter([1 -ARPMX(:,oo/2*(oo-1)+(1:oo))],1,Y(:))-max(Y)+min(Y)]);
        elseif K==12
                %[tmp,ARPmx,PE]= acf2pacf(AutoCov(2:length(AutoCov))/AutoCov(1),AutoCov(1));
                %[arp,rc,PE,ARPMX] = durlev(AutoCov);
                %[tmp,ARPmx]=arp2pacf(AR);
                N = Pmax-1; %2*oo-1; %2^(ceil(log(oo)/log(2)));
                sdf = zeros(512,N); %length(AR));
                for k = 1:N; %[k,size(sdf),N],%length(AR);
                        % [sdf(:,k),F] = freqz(1,[1 -ARPmx(k,1:k)],N);
                        [tmp,F] = freqz(1,[1 -ARPMX(1,k/2*(k+1)+(1:k))]',512);
                        sdf(:,k)=tmp(:);
                        % sdf(:,k)=sqrt(E(k+1))*sdf(:,k);
                end;
                mesh(F/2/pi*Fs,1:N,log10(abs(sdf)'));
                zlabel('log10 |H(f,p)|');ylabel('model order p'); xlabel('frequency f [2*pi rad/s]');
                if exist('OCTAVE_VERSION')<5
                        view(30,45);
                end;
        elseif K==13
                for k=1:M,
                        xxx=eig(toeplitz(AutoCov(1:k)/E(k)));
                        H(k) = .5*sum(log(xxx));
                        H1(k)= H(k)/(k);
                        %xxx1=eig(toeplitz(AutoCov(1:k)/E(k)*E(1)));
                        %xxx1=eig(toeplitz(AutoCorr(1:k)));
                        %H2(k) =.5*sum(log(xxx1));
                        %H3(k)=.5*sum(log(xxx1))/(k);
                        %if any(xxx<=0) fprintf(1,'COV positive definite for p up to %i\n',k-1); break; end;
                end;
                if 0 
                        subplot(211);
                        plot(0:k-1,H2');
                        title('Entropy H(k) depending on number of coefficients')
                        subplot(212);
                        plot(0:k-1,H3');
                        title('Entropy rate H(k) depending on number of coefficients')
                else
                        subplot(311);
                        plot(0:k-1,H');
                        title('Entropy H(k) depending on number of coefficients')
                        subplot(312);
                        xxx=(-diff(log(E(:))))/2; %[size(xxx)size(H) M k]
                        plot(0:k-1,H1','b',1:k,xxx(1:k),'g');
                        %plot(0:k-1,H1','b',0:k-1,log(E(1:k))-log(E(1)),'b',1:k,xxx(1:k),'g');
                        %plot(0:k-1,H1','b',1:k,xxx,'g',1:k-1,cumprod(1+xxx(1:M-1))./H(2:M)','r');
                        title('Entropy rate H(k) and Entropy difference H(k)-H(k+1)')
                        subplot(313);
                        plot(1:k,log(xxx(1:k)),'g');
                        title('LOG Entropy difference for p->p+1: H(k)-H(k+1)')
                end;
        elseif K==14,
                tmp = histo3(MOPS(1:max(1,size(MOPS,1)-1),:));
                if exist('OCTAVE_VERSION')<5,
                        bar(tmp.X,tmp.H,'stacked');
                else
                        bar(tmp.X,sum(tmp.H,2));
                end;
                xlabel('model order p')
                if exist('OCTAVE_VERSION')<5
                        %legend({'FPE','AIC','BIC','SBC','MDL','CAT','PHI','JEW','HAR'});
                        legend('FPE','AIC','BIC','SBC','MDL','CAT','PHI','JEW','HAR');
                end;        
        elseif K==15
                break; 
        end;
end;
