help with matrix and how to extract rows

Hi, would like to manipulate this matrix to get 6x6 matrices.

i like to make the first 6 rows to be the new first row, then 7 to 12 to be the second row and then 13to 19 to be the third row and so one. how can i manipulate the, it should look like this :

Answer 1

[Ameer Hamza]

You can use reshape()

reshape(Radiatondamping(1,:), 6, 6).'

the above will convert first column to 6x6 matrix. To convert all columns and combine them in 3D matrix

permute(reshape(Radiatondamping.', 6, 6, []), [2 1 3])

[Jama Ali]

Hi, when i use that function i get an error saying:

Error using reshape

Number of elements must not change. Use [] as one of the size inputs to automatically calculate the appropriate size for that dimension.

thanks for the help.

[Ameer Hamza]

Oh! I though 36 elements are in one column. Whereas they are in one row. Try the updated code.

[Jama Ali]

Thanks you, it worked. i really apricaited your help. it was helpfull.

one last question, is there a way i can name the different matrices so i can use them separately?

[Ameer Hamza]

No need to save in different name. Such coding practice is discouraged: https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval. You can create a 3D matrix and access its pages

new_Radiatondamping = permute(reshape(Radiatondamping.', 6, 6, []), [2 1 3])

and access values like this

new_Radiatondamping(:,:,1) % 1st 6x6 matrix
new_Radiatondamping(:,:,2) % 2nd 6x6 matrix
new_Radiatondamping(:,:,3) % 3rd 6x6 matrix
..
..
new_Radiatondamping(:,:,end) % last 6x6 matrix

[Jama Ali]

Thank you for your help. It made my school project much easier.

[Ameer Hamza]

I am glad to be of help!

Answer 2

[madhan ravi]

 Wanted = mat2cell(matrix, repelem(6, numel(matrix)/36)) % not tested
 celldisp(Wanted)

Answer 3

[Image Analyst]

Here's one way (tested on made up "data"):

data = randi(99, 12, 6)
[rows, columns] = size(data)
newRows = rows / 6 % This better be an integer!!!
d = data'
Radiatondamping = reshape(d(:), [], newRows)'