Matlab: Create Matrix from Single Column Data

[rishabhdutta]

I have a single column data of say length 1000. I want to make a matrix m * n using that data. m*n may need not be 1000, it can be less. looking for the script.

 

[MATLABdude]

If you're allowed to use built-in commands, you can use 'reshape':
http://www.mathworks.com/help/techdoc/ref/reshape.html

If you're not, you're going to have to do some looping:
http://www.mathworks.com/help/techdoc/matlab_prog/brqy1c1-1.html

We can't do your work for you, however.

 

[rishabhdutta]

Thank you for the effort.

Had to use looping. reshape couldn't help me much as the no. of elements in the desired matrix have to be same as in the provided matrix form. for eg. I would like to get 4*3 matrix from the 15*1 matrix

 

[MATLABdude]

Do you know how to extract parts of vectors / matrices using the colon (:) operator? If not, it's a very useful thing to know:
http://www.mathworks.com/help/techdoc/ref/colon.html

For instance:

A=ones(4,3);
B=eye(3);
C=A(1:3,:)-B;

 

[DeeNos]

To create a matrix from a single column of data in Matlab, you can use the "reshape" function. This function allows you to specify the desired dimensions of the matrix (m*n) and will automatically fill in the remaining elements with the data from the single column. For example, if your single column has 1000 elements and you want a 10x100 matrix, you would use the command "reshape(data, 10, 100)". This will create a 10x100 matrix using the data from the single column. If you want to create a smaller matrix, you can specify the desired dimensions accordingly. You can also use the "size" function to determine the number of elements in your single column and use that information to create a matrix of the appropriate size. I hope this helps.