create cell from array with specified size

Hello,

Let mymatrix a 24x1 double, how is it possible to obtain a group as specified_sizex1 cell?

For example:

mymatrix=[1:24];

group={[mymatrix(1) mymatrix(2)],...}

Answer 1

[Dyuman Joshi]

Note that the specified size must completely divide the number of rows in the column vector -

mymatrix=[1:24].';
size(mymatrix)

ans = 1×2

24 1

%Total number of elements in the vector
n = numel(mymatrix);

%Specified size
ss1 = 2;

out1 = mat2cell(mymatrix, repelem(n/ss1, 1, ss1), 1)

out1 = 2×1 cell array
    {12×1 double}
    {12×1 double}

%Example 2
ss2 = 4;

out2 = mat2cell(mymatrix, repelem(n/ss2, 1, ss2), 1)

out2 = 4×1 cell array
    {6×1 double}
    {6×1 double}
    {6×1 double}
    {6×1 double}

Answer 2

[Fangjun Jiang]

num2cell(mymatrix)

[Gaetano Pavone]

it doesn't work good for a specified_size different from 2

[Fangjun Jiang]

mat2cell(mymatrix,[1],[6, 6, 6, 6])

Answer 3

[Voss]

mymatrix = (1:24).'

mymatrix = 24×1

1 2 3 4 5 6 7 8 9 10

specified_size = 4;

assert(mod(numel(mymatrix),specified_size)==0, ...
    'numel(mymatrix) is not a multiple of specified_size')

group = num2cell(reshape(mymatrix,[],specified_size).',2)

group = 4×1 cell array
    {[      1 2 3 4 5 6]}
    {[   7 8 9 10 11 12]}
    {[13 14 15 16 17 18]}
    {[19 20 21 22 23 24]}