Sort cell array with numeric data by values of first index in matrix

Hello,

I got a set of contour data obtained by [C h] = contour(X,Y,Z) which I want to split into a cell array and sort with respect to contour level.

E.g. C might look like (a lot more than 1 point per level in the real data, but just to illustrate):

   80.7815    1.0000
   -0.7920    0.1039
   32.1231    1.0000
    0.9921    0.4542
   72.1341    1.0000
   -0.1358    0.4279

Then I want the cell array to look like:

   Cn{1} = [32.1231 1; 0.9921 0.4542];
   Cn{2} = [72.1341 1; -0.1358 0.427];
   Cn{3} = [80.7815 1; -0.7920 0.1039];

however, what I manage to produce myself is:

   Cn{1} = [80.7815 1; -0.7920 0.1039];
   Cn{2} = [32.1231 1; 0.9921 0.4542];
   Cn{3} = [72.1341 1; -0.1358 0.427];

So the question is, how can I sort the cells after Cn{k}(1,1)?

Best regards, dm

Answer 1

[dm]

Managed to figure it out:

firstIdx = cellfun(@(x)x(1,1),Cn);
[dummy,order] = sort(firstIdx);
Cns = Cn(order);