How to reshape a matrix?

I have a matrix of size 9*10. I want each row of the matrix get converted into a 2D matrix, like 3*3 and the coloumns which represent the number of observations, which are 10. At the end I want a 3D matrix, comprising 3*3 matrix, which will represent my data points for a particilar observation and the other dimention in coloumns should be of 10, representing the number of obsverations.

Answer 1

[Walter Roberson]

Array3D = reshape(Array2D, 3, 3, []);

[Badavath Purnesh Singh]

Thank you so much!!!!

[Badavath Purnesh Singh]

@Walter Roberson I have just tried the method, it seems the 3*3 matrix which Im getting is by the elements whivh are in coloumn, not the elements which are in row. If you have any other possible methods please illstruate or if the previous method works can you point out possibly where I can commit a mistake.

[Walter Roberson]

You have a 9 x 10 matrix. There are 9 rows with 10 elements in each row. You want to create a 3 x 3 from those 10 elements. That would leave you with one left over. And since you said that the columns represent the number of observations, it does not make sense to form the 3 x 3 matrix from across the different observations.

Perhaps what you need instead is

Array3D = permute(reshape(Array2D, 3, 3, []), [2 1 3]);

[Badavath Purnesh Singh]

@Walter Roberson Im so sorry, I have failed to convey the problem clearly. I have a matrix of 10*9 matrix, in which each row has 9 elements and each row represents one observation. So basically i need my elements(9) in each row to be a 2D matrix of 3*3. I hope I have explained clearly. I'll try the above mentioned line of code by you. if the problem isnt solved, ill reach out to you. Thank you so much.

Thank you so much for pointing out my mistake in explanning my issue.

[Walter Roberson]

Array3D = permute(reshape(Array2D, [], 3, 3), [3 2 1]);