Subsetting equal data from a array to different arrays

Hello, I'm currently working on a overtopping script and now I need to split up my data. I want to go from this data (selecting the rows with the same values in the first two columns):

    0.0010    0.0310       NaN    0.5873
    0.0010    0.0590       NaN    0.8092
    0.0050    0.0310    3.0958    0.7419
    0.0050    0.0310    3.8532    0.7570
    0.0050    0.0310    6.4800    0.6803
    0.0050    0.0310   24.3356    0.6091
    0.0050    0.0310   37.2512    0.6321
    0.0050    0.0310   37.2633    0.5996
    0.0050    0.0310   75.1829    0.6125
    0.0050    0.0310   93.9991    0.6680
    0.0050    0.0590    2.2801    0.8573
    0.0050    0.0590    2.7944    0.8585
    0.0050    0.0600    2.7647    0.8750
    0.0050    0.0600   18.1790    0.8311
    0.0050    0.0600   27.5549    0.8176
    0.0050    0.0600   27.6349    0.8064

To this:

Subset1

    0.0010       0.0310         NaN      0.5873

Subset2

    0.0010      0.0590         NaN      0.8092

Subset3

    0.0050      0.0310      3.0958      0.7419
    0.0050      0.0310      3.8532      0.7570
    0.0050      0.0310      6.4800      0.6803
    0.0050      0.0310     24.3356      0.6091
    0.0050      0.0310     37.2512      0.6321
    0.0050      0.0310     37.2633      0.5996
    0.0050      0.0310     75.1829      0.6125

etc.

[Stephen23]

Although you give some nice input data, your explanation is not clear what output you require, and we can't read minds. Please show the exact output that you would expect from this input data.

Answer 1

[Andrei Bobrov]

a = [    0.0010    0.0310       NaN    0.5873
    0.0010    0.0590       NaN    0.8092
    0.0050    0.0310    3.0958    0.7419
    0.0050    0.0310    3.8532    0.7570
    0.0050    0.0310    6.4800    0.6803
    0.0050    0.0310   24.3356    0.6091
    0.0050    0.0310   37.2512    0.6321
    0.0050    0.0310   37.2633    0.5996
    0.0050    0.0310   75.1829    0.6125
    0.0050    0.0310   93.9991    0.6680
    0.0050    0.0590    2.2801    0.8573
    0.0050    0.0590    2.7944    0.8585
    0.0050    0.0600    2.7647    0.8750
    0.0050    0.0600   18.1790    0.8311
    0.0050    0.0600   27.5549    0.8176
    0.0050    0.0600   27.6349    0.8064];

[~,~,c] = unique(a(:,1:2),'rows');
out = accumarray(c,(1:numel(c))',[],@(x){a(x,:)});

[Jeroen Platteeuw]

Dear Andrei

It works fine, thank you.

Kind regards,

Jeroen