clear path 

global Nx Ny Nz
global lat long dz dm mdep
global delt_su su_its t_su delt
global descriptor this_path
global f deltaf Q beta r_expt r_heat H
global time rots it
global g Cp rho_bar alpha
global u v t w
global iterations


param_file_name =   ...
   input(' Please enter the name of the m-file with the parameters for this run : ','s') ;
feval(param_file_name) ;


iterations

itstart = input(' Please enter start iteration : ','s') 
itend = input(' Please enter end iteration : ','s') 


sizeit=size(iterations);
for i=1:sizeit(1)
iter(i)=eval(iterations(i,1:10));
end
nitstart=find(iter==eval(itstart))
nitend=find(iter==eval(itend))

path   = this_path 
cmdstr=['cd ' path ];
eval(cmdstr);
path=pwd

sum=zeros(Nx,Ny,Nz);
counter=0;

for i=nitstart:nitend
tfilename=(['T.' iterations((i),1:10) ]) ;
t=rdmds(tfilename,'b');
sum=sum+t;
counter=counter+1;
end
meant=sum/counter;

i=find(meant<20);
meant(i)=20;

sum=zeros(Nx,Ny);
for k=Nz:-1:1,
sum=sum+dz*0.0002*(meant(:,:,k)-20);
end


cmax=max(max(sum));
cmin=min(min(sum));
cc=cmax-cmin;
c1=cmin+0.25*cc;
c2=cmin+0.75*cc;
V=[cmin cmax];
figure
caxis('manual')

        title='mean density anomaly';
        imagesc(lat,long,sum(142:230,18:106)');shading flat;axis image;caxis(V);colorbar('vertical');
        set(gca,'ydir','norm')
        text(50,130,descriptor);text(50,-30,num2str(nitend-nitstart+1));text(80,-30,'files');
        text(0,130,title);
        text(0,-10,'from timestep');text(30,-10,num2str(itstart));
	text(70,-10,'to'); text(80,-10,num2str(itend));

hold on

contour(sum',[c1 c1],'b')

hold on

contour(sum',[c2 c2],'b')

hold off

NNN=Ny/2;
ii=find(sum(:,NNN)>c1);
iw1=ii(1)-1+(c1-sum(ii(1)-1,NNN))/(sum(ii(1),NNN)-sum(ii(1)-1,NNN))
% iii=size(ii);
% ie1=ii(iii(1))+0.5

ii=find(sum(:,NNN)>c2);
iw2=ii(1)-1+(c2-sum(ii(1)-1,NNN))/(sum(ii(1),NNN)-sum(ii(1)-1,NNN))
% iii=size(ii);
% ie2=ii(iii(1))+0.5
xi=iw2-iw1