FUNCTION dustem_mpfit_run,x,p_min,_EXTRA=_extra

;+
; NAME:
;    dustem_mpfit_run_vg
; PURPOSE:
;    function used to fit dustem model with dustem_mpfit_sed
; CATEGORY:
;    Dustem
; CALLING SEQUENCE:
;    res=dustem_mpfit_run_vg(x,params[,_EXTRA=extra][,cc_sed=cc_sed][,/help])
; INPUTS:
;    x         = necessary for interface but unused
;    params    = Dustem Model parameters normalized to initial values
; OPTIONAL INPUT PARAMETERS:
;    cc_sed    = SED color correction factors
;    _extra    = extra parameters for the plot routine
; OUTPUTS:
;    None
; OPTIONAL OUTPUT PARAMETERS:
;    None
; ACCEPTED KEY-WORDS:
;    help      = If set, print this help
; COMMON BLOCKS:
;    None
; SIDE EFFECTS:
;    SED and model are plotted if !dustem_show_plot
; RESTRICTIONS:
;    The dustem idl wrapper must be installed
; PROCEDURE:
;    None
; EXAMPLES
;    res=dustem_mpfit_run_vg(x,params[,_EXTRA=extra][,cc_sed=cc_sed][,/help])
;  ODIFICATION HISTORY:
;    Adapted to extinction and polarization by Vincent Guillet (IAS)
;    Written by J.-Ph. Bernard
;    see evolution details on the dustem cvs maintained at CESR
;    Contact J.-Ph. Bernard (Jean-Philippe.Bernard@cesr.fr) in case of problems.
;-

;note that x is not used.

IF keyword_set(help) THEN BEGIN
  doc_library,'dustem_mpfit_run'
  sed=0.
  goto,the_end
ENDIF

p_dim=p_min*(*(*!dustem_fit).param_init_values)

IF !run_ionfrac gt 0. THEN toto = dustem_create_ionfrac()

;RUN THE MODEL AND GET THE SPECTRUM

;stop
dustem_activate_plugins,p_dim/(*(*!dustem_fit).param_init_values),st ;st is an output...

;stop

;st1 = dustem_run(p_dim) 
    
;stop

st_model=dustem_read_all(!dustem_soft_dir)


chi2_sed      = 0  
chi2_ext      = 0  
chi2_qsed      =0
chi2_used      =0 
chi2_qext      =0
chi2_uext      =0 

rchi2_sed     = 0
rchi2_ext     = 0
rchi2_qsed     =0
rchi2_used     =0
rchi2_qext     =0
rchi2_uext     =0

wrchi2_sed    = 0
wrchi2_ext    = 0
wrchi2_qsed    =0
wrich2_used    =0
wrchi2_qext    =0
wrich2_uext    =0

n_sed         = 0
n_ext         = 0
n_qsed         =0
n_used         =0
n_qext         =0
n_uext         =0

win = 0

tagnames=tag_names(!dustem_data)
dustem_out = [0]
ind_data_tag=dustem_data_tag(count=count_data_tag)

;stop


;NB: THIS PART CONTAINS THE INTERPOLATES USED FOR THE COMPUTATION OF THE CHI-SQUARED


FOR i_tag=0,count_data_tag-1 DO BEGIN

    CASE tagnames(ind_data_tag(i_tag)) OF
        
		'SED'	: BEGIN
    		
	        dustem_sed = dustem_compute_sed(p_dim,st,SED_spec)
	        chi2_sed   = total(((*!dustem_data.sed).values-dustem_sed)^2/(*!dustem_data.sed).sigma^2)
			n_sed = n_elements((*!dustem_data.sed).values)
	       	rchi2_sed  = chi2_sed / n_sed
	       	wrchi2_sed  = rchi2_sed * !fit_rchi2_weight.sed
	       	message,"chi2 SED = "+strtrim(chi2_sed,2)+"  rchi2 SED = "+strtrim(rchi2_sed,2),/continue;," weighted rchi2 SED=",wrchi2_sed
			;print,'wl ',(*!dustem_data.sed).wav
			;print,"Delta SED per wl: ",(*!dustem_data.sed).values-dustem_sed
			;print,"error per wl: ",(*!dustem_data.sed).sigma
			;print,"chi2 per wl: ",((*!dustem_data.sed).values-dustem_sed)^2/(*!dustem_data.sed).sigma^2
	        alpha = total(((*!dustem_data.sed).values*dustem_sed)/(*!dustem_data.sed).sigma^2) $
	              		/ total(((*!dustem_data.sed).values)^2/(*!dustem_data.sed).sigma^2)
	        beta = total(((*!dustem_data.sed).values*dustem_sed)/(*!dustem_data.sed).sigma^2) $
	             		/ total(dustem_sed^2/(*!dustem_data.sed).sigma^2)
		
	        print,"Best SED chi2 obtained if f_HI = ",alpha, " or if we multiply model by ",beta
	        (*!dustem_fit).chi2=chi2_sed
	        (*!dustem_fit).rchi2=rchi2_sed
            
            ;I think think this test isn't the correct one because when we want to show the SED data and not fit it we have an issue
            ;with the current hiding/showing formalism!!!!
            ;figure it out.  
	        if isa(!dustem_data.sed) then dustem_out = [ dustem_out, dustem_sed ]
            
		END

		'EXT' 	: BEGIN ;STILL HAVEN'T DONE THE EXTINCTION PART
    		
    		;ADDING PLUGIN TO SPECTRUM----------------
    		IF ptr_valid(*!dustem_plugin) THEN BEGIN
    		for i=0L,n_tags(*!dustem_scope)-1 do begin
            if total(strsplit(*(*!dustem_scope).(i),'+',/extract) eq 'ADD_EXT') then st.ext.ext_tot+=(*(*!dustem_plugin).(i))
            endfor
            endif
        	;------------------------------------------
        	
			dustem_ext = interpol(st.ext.ext_tot,st.ext.wav,(*!dustem_data.ext).wav) 
            
	        chi2_ext   = total(((*!dustem_data.ext).values-dustem_ext)^2/(*!dustem_data.ext).sigma^2)
			n_ext = n_elements((*!dustem_data.ext).values)
			rchi2_ext  = chi2_ext / n_ext
	        	wrchi2_ext  = rchi2_ext * !fit_rchi2_weight.ext
	        	print,"chi2 EXT = ",chi2_ext,"  rchi2 EXT = ",rchi2_ext;," weighted rchi2 EXT=",wrchi2_ext
	        	;print,"chi2 per wl: ",((*!dustem_data.ext).values-dustem_ext)^2/(*!dustem_data.ext).sigma^2

			; Plot if needed
			IF !dustem_show_plot NE 0 THEN BEGIN

				win+=1
	                	;dustem_plot_ext,st,yr=[1.e-6,1.e0],/ysty,xr=[0.5,40],/xsty,win=win
				xr=[0.3,40]
				yr=[1.e-26,1.e-21]
				dustem_plot_ext,st,yr=yr,/ysty,xr=xr,/xsty,ps=filename,win=win,mergePAH=mergePAH,/donotclose,multi=1
				dustem_plot_ext,st,yr=yr,/ysty,xr=xr,/xsty,ps=filename,win=win,mergePAH=mergePAH,multi=2
        		
				win+=1
	                	;dustem_plot_ext,st,/UV,yr=[0,2.5],/ysty,xr=[0,10],/xsty,win=win
				xr=[0.2,10]
				yr=[0,3e-21]
				dustem_plot_ext,st,/UV,yr=yr,/ysty,xr=xr,/xsty,ps=filename,win=win,mergePAH=mergePAH,/donotclose,multi=1
				dustem_plot_ext,st,/UV,yr=yr,/ysty,xr=xr,/xsty,ps=filename,win=win,mergePAH=mergePAH,multi=2

			ENDIF
			
			;dustem_plot_ext,st,/print_Rv ;commented this recently

		 	dustem_out = [ dustem_out, dustem_ext ]

		 	END

		'POLEXT': BEGIN

			
			;---------------the procedure within this block has not been updated for a vert long time
			IF !dustem_show_plot NE 0 and !run_circ then begin
	                   win+=1
	                 
				dustem_plot_circ,st,win=win,xr=[0.1,5],aligned=st_model.align.grains.aligned,yr=[-0.03,0.03]
			endif
			;--------------------------------------------------------------------------------------
			
			

			IF !run_lin then begin
                    ;compute_polext needs updating. It's been months. 
                    dustem_polext = dustem_compute_polext(p_dim,st,dustem_qext,dustem_uext,Q_ext,U_ext)
	        		chi2_polext   = total(((*!dustem_data.polext).values-dustem_polext)^2/(*!dustem_data.polext).sigma^2)
;     				n_polext = n_elements((*!dustem_data.polext).values)
; 	        		rchi2_polext  = chi2_polext / n_polext
; 	        		wrchi2_polext  = rchi2_polext * !fit_rchi2_weight.polext
; 	        		print,"chi2 POLEXT = ",chi2_polext,"  rchi2 POLEXT = ",rchi2_polext;," weighted rchi2 POLEXT=",wrchi2_polext
	        		;print,"chi2 per wl: ",((*!dustem_data.polext).values-dustem_polext)^2/(*!dustem_data.polext).sigma^2

	        		; Fit in (pmax,lmax,K)
	        		x=st.polext.wav
	        		logx=alog(x)
	        		logy=alog(st.polext.ext_tot)
	        		
	        		; Whittet+1992 (Table 1)
	        		Uband = 0.36
	        		Bband = 0.43
	        		Vband = 0.55
	        		Rband = 0.63
	        		Iband = 0.78
	        		Jband = 1.21
	        		Hband = 1.64
	        		Kband = 2.04
	        		bands = [Uband,Bband,Vband,Rband,Iband,Jband,Hband]
	        		nbands = n_elements(bands)
	        		jband = indgen(nbands)*0
	        		for k=0,nbands-1 do begin
	                		xx=min(abs(st.polext.wav-bands(k)),j)
	                		jband(k) = j
	        		endfor
	        		;j=where(st.polext.ext_tot gt 0 and x gt 0.2 and x lt 1)
	        		res = poly_fit(logx(jband),logy(jband),2)
			
	        		print
	        		print,"Serkowski Fit with free K over ",string(st.polext(jband).wav,format='(100F5.2)')
	        		print,"-------------------------"
	        		K    = -res(2)
	        		lmax = exp(res(1)/(2*K))
	        		pmax = exp(res(0)+K*alog(lmax)^2)
	        		print,"* lmax = ",lmax," micron"
	        		print,"* K    = ",K
	        		print,"* pmax = ",pmax," for NH=1e21"
	        		print
			
				; Plot if needed
				IF !dustem_show_plot NE 0 THEN BEGIN

;  	       			; Polarization fraction in the UV-IR
;  	                win+=1
; 	                           
;  	       			dustem_plot_polar,st,p_dim,aligned=st_model.align.grains.aligned,yr=[0,0.15],/ysty,xr=[0.1,50],/xsty,win=win;multi=0,ps=filename
; ; 					
	   				; Polarisation curve (Serkowski)
 					win+=1
 					;xr=[0.3,1e4]
 					xr=[1e-4,3.5]
 					yr=[1e-30,5e-24]
 					
 					dustem_plot_polext,st,p_dim,dustem_polext,aligned=st_model.align.grains.aligned,win=win
 					
;  					dustem_plot_polar,st,p_dim,aligned=st_model.align.grains.aligned,/UV,yr=yr,/ysty,xr=xr,/xsty,ps=filename,win=win,/donotclose,multi=1
;  					dustem_plot_polar,st,p_dim,aligned=st_model.align.grains.aligned,/UV,yr=yr,/ysty,xr=xr,/xsty,ps=filename,win=win,multi=2
		
;  					win+=1
;  					dustem_plot_fpol,win=win,xr=[10,1000],yr=[0,1.1]
;  					
	                                
	            ENDIF

				;dustem_plot_polar,st,/print_ratio,cont=cont
	                     
				dustem_out = [ dustem_out, dustem_polext ]

			ENDIF

			END

        'QSED': BEGIN 
        		    
		        toto = dustem_compute_stokes(p_dim,st,dustem_qsed,dustem_used,Q_spec,U_spec,PSI_spec) 
		       
		        ;taking care of the color correction for spass ; SHOULD NOT LEAVE THIS ON
		        ;dustem_qsed(-1)=dustem_qsed(-2)
; 		        testspass1 = ((*!dustem_data.qsed).filt_names)(-1) eq 'SPASS1' 
;  			    if testspass1 then dustem_qsed(-1)=dustem_qsed(-2)
;  			    
			    chi2_qsed = total(((*!dustem_data.qsed).values-dustem_qsed)^2/(*!dustem_data.qsed).sigma^2) 
			    n_qsed = n_elements((*!dustem_data.qsed).values)
			    rchi2_qsed  = chi2_qsed / n_qsed
	        	wrchi2_qsed  = rchi2_qsed * !fit_rchi2_weight.qsed 
	            if isa(!dustem_data.qsed) then dustem_out = [ dustem_out, dustem_qsed ] ; classic command
	            message,"chi2 QSED = "+strtrim(chi2_qsed,2)+"  rchi2 QSED = "+strtrim(rchi2_qsed,2),/continue;," weighted rchi2 POLSED=",wrchi2_polsed
	        	print,"chi2 per wl: ",((*!dustem_data.qsed).values-dustem_qsed)^2/(*!dustem_data.qsed).sigma^2
		        
		    END   

        'USED': BEGIN
        		    ;THIS IMPLIES THAT QSED HAS BEEN RAN BEFORE 
    		    ;toto = dustem_compute_stokes(p_dim,st,dustem_qsed,dustem_used,Q_spec,U_spec) 
 			    chi2_used  = total(((*!dustem_data.used).values-dustem_used)^2/(*!dustem_data.used).sigma^2) 
 			    n_used = n_elements((*!dustem_data.used).values)
 			    rchi2_used  = chi2_used / n_used
  	        	wrchi2_used  = rchi2_used * !fit_rchi2_weight.used
 	            if isa(!dustem_data.used) then dustem_out = [ dustem_out, dustem_used] ; classic command
 	            message,"chi2 USED = "+strtrim(chi2_used,2)+"  rchi2 USED = "+strtrim(rchi2_used,2),/continue;," weighted rchi2 POLSED=",wrchi2_polsed
  	        	print,"chi2 per wl: ",((*!dustem_data.used).values-dustem_used)^2/(*!dustem_data.used).sigma^2
                
  		END
  		
        'POLSED': BEGIN
		    
		          ;PLUGIN IS ADDED INSIDE DUSTEM_COMPUTE_SED
 			
             	  IF !run_pol and !run_lin THEN BEGIN
  
            	       	dustem_polsed = dustem_compute_polsed(p_dim,st,P_spec,SP_spec);dustem_compute_polsed(p_dim,st,cont=cont,freefree=freefree,synchrotron=synchrotron)
 	        
         		  ENDIF
		END
    	
    	'PSI_EM' : BEGIN
                   
                   IF !run_pol and !run_lin THEN BEGIN
                       degtorad = !pi/180
                       if ~isa(dustem_used) or ~isa(dustem_qsed) then toto = dustem_compute_stokes(p_dim,st,dustem_qsed,dustem_used,Q_spec,U_spec,PSI_spec)
                       dustem_psi_em = 0.5*atan(dustem_used,dustem_qsed)/degtorad 
                       
                      
                   ENDIF		
    	END
    	
    	
    	'POLFRAC': BEGIN 
      		
      		if !run_lin then begin
      		
                  if ~isa(dustem_sed) then dustem_sed = dustem_compute_sed(p_dim,st,SED_spec) 
                  if ~isa(dustem_polsed) then dustem_polsed = dustem_compute_polsed(p_dim,st,P_spec,SP_spec) ; this quantity hasn't been computed yet that is why this line is present here.      
                  
                  
                  ;commenting this for now. 
                  
;                   ind_filt=where((*!dustem_data.polfrac).filt_names NE 'SPECTRUM',count_filt) ;locating the filters of polfrac=smallp in SED xcat        
;                   ind_fspec=where((*!dustem_data.polfrac).filt_names EQ 'SPECTRUM',count_fspec) ;locating the spectrum points in polfrac data. Later testing will have to be on the wavelengths    
;                 
;                 ;dustem_sed and dustem_polsed might not have the same length thus this block.
;                 
                  If n_elements(dustem_sed) ne n_elements(dustem_polsed) then begin                            
                      if n_elements(dustem_sed) gt n_elements(dustem_polsed) then begin 
                          
                          dustem_polsed_x = dustem_polsed
                          dustem_sed_x = dustem_polsed ;meaning dustem_sed needs to be modified
                          
                          nwaves = n_elements(dustem_polsed)
                          ;nwaves = n_elements((*!dustem_data.polfrac).wav) should give the same result.... TEST this
                          
                          
                          ;NOTA BENE: We do not need to match the filter or the data points. We just need to loop over the wavelengths.
                          ;This is what we do when we filter the data prior (in the main dustemwrap fitting procedure level). 
                          
                          ;commenting this for now 
                          ;matching the filter data points
;                           IF count_filt ne 0 then begin
;                               for i=0L,count_filt-1 do begin    
;                                   j=where((*!dustem_data.sed).filt_names EQ (*!dustem_data.polfrac).filt_names(ind_filt(i)),testfilt)
;                                   if testfilt ne 0 then dustem_sed_x(ind_filt(i)) = dustem_sed(j(0))                                                 
;                               endfor                                        
;                           endif
                          
                          
;                           ;matching the spectrum data points    
;                           IF count_fspec ne 0 then begin
;                               for i=0L,count_fspec-1 do begin
;                                   
;                                   j=where((*!dustem_data.sed).wav EQ (*!dustem_data.polfrac).wav(ind_fspec(i)),testspec)
;                                   if testspec ne 0 then dustem_sed_x((ind_fspec(i))) = dustem_sed(j(0))                                    
;                              endfor
;                           endif
                          
                          ;NEW SECTION
                          for i=0L,nwaves-1 do begin
                          
                              j=where((*!dustem_data.sed).wav EQ (*!dustem_data.polfrac).wav(i),testwav)
                              if testwav ne 0 then dustem_sed_x(i) = dustem_sed(j(0))                                    
                          
                          endfor
                          
                          
                               
                    endif ELSE begin
                        
                        dustem_polsed_x = dustem_sed
                        dustem_sed_x = dustem_sed ;meaning dustem_polsed needs to be modified
                        
                        nwaves = n_elements(dustem_sed)
                        
                        
                        
;                         ;matching the filter data points
;                         IF count_filt ne 0 then begin
;                             for i=0L,count_filt-1 do begin    
;                                 j=where((*!dustem_data.sed).filt_names EQ (*!dustem_data.polfrac).filt_names(ind_filt(i)),testfilt)
;                                 if testfilt ne 0 then dustem_polsed_x(ind_filt(i)) = dustem_polsed(j(0))                                                 
;                             endfor                                        
;                         endif
;                         
                        
;                         ;matching the spectrum data points    
;                         IF count_fspec ne 0 then begin
;                             for i=0L,count_fspec-1 do begin
;                                 j=where((*!dustem_data.sed).wav EQ (*!dustem_data.polfrac).wav(ind_fspec(i)),testspec)
;                                 if testspec ne 0 then dustem_polsed_x((ind_fspec(i))) = dustem_polsed(j(0))                                    
;                             endfor
;                         endif
                        
                        
                        for i=0L,nwaves-1 do begin
                          j=where((*!dustem_data.sed).wav EQ (*!dustem_data.polfrac).wav(i),testwav)
                          if testwav ne 0 then dustem_polsed_x(i) = dustem_polsed(j(0))                                    
                        endfor
                  
                    
                    ENDELSE
                endif ELSE BEGIN
                    dustem_polsed_x = dustem_polsed 
                    dustem_sed_x = dustem_sed
                ENDELSE
                
                dustem_polfrac = dustem_polsed_x/dustem_sed_x 
                	       
            ENDIF
            
            ;stop
 			END

 		
  		'QEXT': BEGIN ; Q - EXTINCTION CROSS SECTION
                   
 			    chi2_qext   =total(((*!dustem_data.qext).values-dustem_qext)^2/(*!dustem_data.qext).sigma^2) 
   			    n_qext = n_elements((*!dustem_data.qext).values)
   			    rchi2_qext  = chi2_qext / n_qext
  	        	wrchi2_qext  = rchi2_qext * !fit_rchi2_weight.qext
   	            dustem_out = [ dustem_out, dustem_qext] ; classic command
   	            message,"chi2 QEXT = "+strtrim(chi2_qext,2)+"  rchi2 QEXT = "+strtrim(rchi2_qext,2),/continue;," weighted rchi2 POLSED=",wrchi2_polsed
  	        	print,"chi2 per wl: ",((*!dustem_data.qext).values-dustem_qext)^2/(*!dustem_data.qext).sigma^2
                if !dustem_show_plot ne 0 then begin
	            
	            win+=1
                window  ,win ,title='DUSTEM WRAP (QEXT)'	                 
                titqex='Q-polarized Cross-section'
                ytitqex=textoidl('\sigma_{Q}/N_H (cm^2/H)')
                xtit=textoidl('\lambda^{-1} (\mum^{-1})')
    	        ;xr=[0.3,1e4]
    	        xr=[1e-4,3.5]
    	          
                yr=[1e-34,5e-24]
                indqex=where(Q_ext lt 0, countqex)
                ylog=1
                if countqex ne 0 then begin
                ylog=0
                yr=[-9e-27,5e-27]  
                endif 
                normpol = st.polext.ext_tot * 0. + 1.d21  
                cgplot,1/st.polext.wav,Q_ext,xtit='',ytit=ytitqex,tit=titqex,ylog=ylog,/xlog,xr=xr,yr=yr,/ys,/xs,position=[0.17,0.35,0.93,0.93],xtickformat='(A1)',color='black'
                cgoplot,1/st.polext.wav,Q_ext/normpol,color='black'
                cgoplot,1/(*!dustem_data.qext).wav,(*!dustem_data.qext).values/normpol,color='Indian Red',psym=16,symsize=1,thick=2
                err_bar,1/(*!dustem_data.qext).wav,(*!dustem_data.qext).values/normpol,yrms=3.*((*!dustem_data.qext).sigma)/2/normpol,color=cgColor('Indian Red')
                cgoplot,1/(*!dustem_data.qext).wav,dustem_qext/normpol,psym=6,color='red',symsize=2
                
                
                
                cgplot,1/st.polsed.wav,Q_ext/Q_ext,xtit=xtit,ytit='Normalized',tit='',/xlog,xr=xr,/ys,/xs,yr=[0,2],ylog=0,position=[0.17,0.14,0.93,0.35],/noerase,yticks=2,ymino=5,xticklen=0.1    
                cgoplot,1/st.polsed.wav,Q_ext/Q_ext,color='black'
                cgoplot,1/(*!dustem_data.qext).wav,(*!dustem_data.qext).values/dustem_qext,color='Indian Red',psym=16,symsize=1,thick=2
                err_bar,1/(*!dustem_data.qext).wav,(*!dustem_data.qext).values/dustem_qext,yrms=3.*((*!dustem_data.qext).sigma)/2.,color=cgColor('Indian Red')
                    
            	            endif                  
     	           
  		END
;  		
  		'UEXT': BEGIN
  
 			    
 			    chi2_uext   =total(((*!dustem_data.uext).values-dustem_uext)^2/(*!dustem_data.uext).sigma^2) 
   			    n_uext = n_elements((*!dustem_data.uext).values)
   			    rchi2_uext  = chi2_uext / n_uext
  	        	wrchi2_uext  = rchi2_uext * !fit_rchi2_weight.uext
   	            dustem_out = [ dustem_out, dustem_uext] ; classic command
   	            message,"chi2 UEXT = "+strtrim(chi2_uext,2)+"  rchi2 UEXT = "+strtrim(rchi2_uext,2),/continue;," weighted rchi2 POLSED=",wrchi2_polsed
  	        	print,"chi2 per wl: ",((*!dustem_data.uext).values-dustem_uext)^2/(*!dustem_data.uext).sigma^2
                if !dustem_show_plot ne 0 then begin
	            
	            win+=1
                window  ,win ,title='DUSTEM WRAP (UEXT)'	                 
                tituex='U-polarized Cross-section'
                ytituex=textoidl('\sigma_{U}/N_H (cm^2/H)')
                xtit=textoidl('\lambda^{-1} (\mum^{-1})')
    	        ;xr=[0.3,1e4]
    	        xr=[1e-4,3.5]
    	          
                yr=[1e-34,5e-24]
                induex=where(U_ext lt 0, countuex)
                ylog=1
                if countuex ne 0 then begin
                ylog=0
                yr=[-9e-27,5e-27]  
                endif 
                normpol = st.polext.ext_tot * 0. + 1.d21  
                cgplot,1/st.polext.wav,U_ext,xtit='',ytit=ytituex,tit=tituex,ylog=ylog,/xlog,xr=xr,yr=yr,/ys,/xs,position=[0.17,0.35,0.93,0.93],xtickformat='(A1)',color='black'
                cgoplot,1/st.polext.wav,U_ext/normpol,color='black'
                cgoplot,1/(*!dustem_data.uext).wav,(*!dustem_data.uext).values/normpol,color='Steel Blue',psym=16,symsize=1,thick=2
                err_bar,1/(*!dustem_data.uext).wav,(*!dustem_data.uext).values/normpol,yrms=3.*((*!dustem_data.uext).sigma)/2/normpol,color=cgColor('Steel Blue')
                cgoplot,1/(*!dustem_data.uext).wav,dustem_uext/normpol,psym=6,color='red',symsize=2
                
                
                
                cgplot,1/st.polsed.wav,U_ext/U_ext,xtit=xtit,ytit='Normalized',tit='',/xlog,xr=xr,/ys,/xs,yr=[0,2],ylog=0,position=[0.17,0.14,0.93,0.35],/noerase,yticks=2,ymino=5,xticklen=0.1    
                cgoplot,1/st.polsed.wav,U_ext/U_ext,color='black'
                cgoplot,1/(*!dustem_data.uext).wav,(*!dustem_data.uext).values/dustem_uext,color='Steel Blue',psym=16,symsize=1,thick=2
                err_bar,1/(*!dustem_data.uext).wav,(*!dustem_data.uext).values/dustem_uext,yrms=3.*((*!dustem_data.uext).sigma)/2/normpol,color=cgColor('Steel Blue')
                    
            	            endif                  
     	          
 	           
  		END
 		
	    ELSE :;IF tagnames(ind_data_tag(i_tag)) NE 'POLFRAC' THEN stop 
    ENDCASE

ENDFOR
dustemwrap_plot,p_dim,st,dustem_sed,SED_spec,dustem_qsed,Q_spec,dustem_used,U_spec,dustem_polsed,P_spec,dustem_polfrac,SP_spec, dustem_psi_em, PSI_spec,_extra=_extra

DOF = n_elements(p_min)
total_chi2 = 0
total_rchi2 = 0
total_n = 0
if !fit_rchi2_weight.ext ne 0 then begin
	total_n += n_ext
	total_chi2 +=  chi2_ext
	total_rchi2 += rchi2_ext
endif
if !fit_rchi2_weight.sed ne 0 then begin
	total_n += n_sed
	total_chi2 += chi2_sed
	total_rchi2 += rchi2_sed
endif
if !run_pol then begin

    if !fit_rchi2_weight.qsed ne 0 then begin
    	total_n += n_qsed
    	total_chi2 += chi2_qsed
    	total_rchi2 += rchi2_qsed
    endif
    if !fit_rchi2_weight.used ne 0 then begin
    	total_n += n_used
    	total_chi2 += chi2_used
    	total_rchi2 += rchi2_used
    endif
    if !fit_rchi2_weight.qext ne 0 then begin
    	total_n += n_qext
    	total_chi2 += chi2_qext
    	total_rchi2 += rchi2_qext
    endif
    if !fit_rchi2_weight.uext ne 0 then begin
    	total_n += n_uext
    	total_chi2 += chi2_uext
    	total_rchi2 += rchi2_uext
    endif

endif


total_wchi2 = chi2_ext * !fit_rchi2_weight.ext $
            + chi2_sed * !fit_rchi2_weight.sed 
if !run_pol then begin
	total_wchi2 	+=  $;chi2_polext  * !fit_rchi2_weight.polext $
;              		 + chi2_polsed  * !fit_rchi2_weight.polsed $
;              		 + chi2_polfrac * !fit_rchi2_weight.polfrac $
             		 + chi2_qsed * !fit_rchi2_weight.qsed $
             		 + chi2_used * !fit_rchi2_weight.used $
             		 + chi2_qext * !fit_rchi2_weight.qext $
             		 + chi2_uext * !fit_rchi2_weight.uext  
endif

message,'======================================================================',/continue
print,"Total weighted chi2 driving mpfitfun = ", total_wchi2
print,"Nb of data points = ", total_n
print,"DOF = ", DOF
print,"Reduced chi2 EXT/SED/POLEXT/POLSED/POLFRAC",rchi2_ext,rchi2_sed;,rchi2_polext;,rchi2_polsed,rchi2_polfrac
print,"Weighted reduced chi2 EXT/SED/POLEXT/POLSED/POLFRAC",wrchi2_ext,wrchi2_sed;,wrchi2_polext;,wrchi2_polsed,wrchi2_polfrac
if !run_pol then 	print,"Weights",!fit_rchi2_weight.ext,!fit_rchi2_weight.sed $;,!fit_rchi2_weight.polext $;,!fit_rchi2_weight.polsed,!fit_rchi2_weight.polfrac $ 
else 			print,"Weights",!fit_rchi2_weight.ext,!fit_rchi2_weight.sed
print,"Mean weighted reduced chi2 = ", total_wchi2/(total_n-DOF)
print,"Unweighted reduced Total chi2 = ", total_chi2/(total_n-DOF)
print,"Unweighted mean reduced chi2 = ", total_rchi2/4*total_n/(total_n-DOF);total_rchi2/4*total_n/(total_n-DOF) original
message,'======================================================================',/continue

;print,"Total reduced chi2 = ", (wrchi2_sed+wrchi2_ext+wrchi2_polext+wrchi2_polsed+wrchi2_polfrac)/(n_sed+n_ext+n_polext+n_polsed+n_polfrac-DOF)
; Reduced chi2 is like if there were the same nb of data points for each curve
;print,"Mean reduced chi2 = ", (wrchi2_sed+wrchi2_ext+wrchi2_polext+wrchi2_polsed+wrchi2_polfrac) * total_n/(total_n-DOF)

; Plot size distribution
win+=1
xr=[0.3,5e3]
yr=[0.1,100]
;IF !dustem_show_plot NE 0 THEN dustem_plot_sdist,xr=xr,yr=yr,ps=filename,win=win;,/donotclose

; Suppress the artificial [0] at the beginning 
dustem_out = dustem_out[1:*]

;IF defined(extra) THEN BEGIN
;  IF keyword_set(extra.plot_it) THEN BEGIN
;;    message,'params='+strtrim(p_min,2),/info,/continue
;;    stop
;    print,'dustem_mpfit_run_vg: Current parameters values:',p_dim
;  ENDIF
;ENDIF

the_end:

RETURN,dustem_out

END