How to plot contourf using following information?

I am having data as follows:

lon 256*1double

lat 128*1double

time 3654*1double

pr 256*128*3654double

I am using contourf(lon,lat,pr(:,:,:)) or contourf(lon,lat,pr(:,:,:)') but there is error of dimension

Answer 1

[KSSV]

pr is a 3D matrix, you cannot use contourf on a 3D matrix. You need to draw layer by layer.

[m,n,p] = size(pr) ; 
for i = 1:p
    contourf(lon,lat,pr(:,:,i)) ; % if throws error, trispose pr
    drawnow
end

Also have a look on slice.

[UTKARSH VERMA]

Thank you!

Answer 2

[Bjorn Gustavsson]

You would have to make one contour-plot for each time-step:

i_time = 1;
contourf(lon,lat,pr(:,:,i_time)')

If I understood the dimensions correctly. So to get all you'll have to "animate" in some fashion. What gives the best illustration of what's going on depends on what's going on (a tautology, I know) so you have to be prepared to try different ideas to see what works best. I can for example imagine something like this working:

for i_time = 1:(size(pr,3)-3)
    contour(lon,lat,pr(:,:,i_time)',10,'b')
    hold on
    contour(lon,lat,pr(:,:,i_time+1)',10,'c')    
    contour(lon,lat,pr(:,:,i_time+2)',10,'g')
    contour(lon,lat,pr(:,:,i_time+3)',10,'r')    
    hold off
    drawnow
end

HTH

[UTKARSH VERMA]

Thank you!