How can i get sub matrices with using for loop

Hello everyone

I have a matrix A as:

A=[1
1
1
1
1
1
1
1
1
1
2
2
2
2
2
2
2
2
2
2
3
3
3
3
3
4
4
4
4
4
5
5
5
5
5
6
6
6
6
6
7
7
7
7
7
7
7
7
7
7
8
8
8
8
8
8
8
8
8
8
9
9
9
9
9
9
9
9
9
9
10
10
10
10
10
10
10
10
10
10
11
11
11
11
11
11
11
11
11
11
12
12
12
12
12
12
12
12
12
12]

I get unique(A) as 12. And then i want to get new matrices as

for i=1, A(1) as row which is equal to i. And for i=2, A(2) as row which is equal to i.............for i=12 A(12) as rows which is equal to i.

For example:

A(1)=[1
1
1
1
1
1
1
1
1
1]

A(2)=[2
2
2
2
2
2
2
2
2
2]

A(3)=[3
3
3
3
3]
........
A(12)=[12
12
12
12
12
12
12
12
12
12]

How can i do this with using for loop or another way? I want to get new matrices as A(1) to A(12).

Answer 1

[Kevin Phung]

you can store each unique value in a cell array:

A_unique = unique(A);
A2 = cell(size(A_unique))
for i = 1:numel(A_unique)
    A2{i} = A(A==A_unique(i))
end

then simple call out:

A{1}
A{2}
A{3}

%... etc

[Mooner Land]

Thank you friend, i can already get something like this.

I wan to run a code for every seperate A{i} matrix.

something like this

for i=1:12

B{i}=(i+3)*A{i}^2

end

This is a simplicated code as an example. I have a bigger code to run for every seperate matrix. I hope i could tell my problem.

Thank you.

[Kevin Phung]

for i=1:12
B{i}=(i+3).*A{i}.^2
end

you need a dot (.) before your multiplication and exponent operator.

Answer 2

[madhan ravi]

a=arrayfun(@(x)A(A==unique(x)),A,'un',0)
celldisp(a)

If you’re goal is simply to create A with repetitions of 10 then it’s simply:

A = num2cell(repmat(1:12,10,1),1)

celldisp(A)

[Mooner Land]

Thank you friend, i can already get something like this.

I wan to run a code for every seperate A{i} matrix.

something like this

for i=1:12

B{i}=(i+3)*A{i}^2

end

This is a simplicated code as an example. I have a bigger code to run for every seperate matrix. I hope i could tell my problem.

Thank you.

[madhan ravi]

How's this related to the question you originally asked?

[Mooner Land]

I want to get every seperate matrix for come calculations but i cant split matrix to 12 seperate matrix.