Sparse Array with reshape

I have a similar type of problem Yesterday but that is with non-sparse matrix. I am very newly dealing with these sparse matrix stuffs.

X = sparse(rand(360, 4^3));

Y = sparse(rand(10, 4^3));

FF = reshape(X, 36, 10, []);

TT = reshape(Y, 1, 10, []);

Result = reshape(FF .* TT, 360, []);

Error: Error using reshape.ND sparse arrays are not supported.

**** My actual sparse matrix size is very big so I cannot use "full" fuction there. *******

Explanation what I actually want :

Here, the size of X and Y is 360x1 and 10x1 sparse matrix respectively. I want to multiply in such a manner that the : first 36 row of F will be multiplied by the first row of T and next 36 row of F will be multiplied by second row of T and continue the like this. And the resultant Matrix will have the size (360,4^3). I am getting error because I know that 3D array cannot be reshaped in MATLAB.

Answer 1

[Matt J]

Consider downloading ndSparse.

FF = ndSparse.sprand( [36, 10,4^3],0.2);
TT = ndSparse.sprand([1,10, 4^3], 0.2);
Result = sparse2d( reshape(FF .* TT, 360, []) );

whos FF TT  Result

  Name          Size               Bytes  Class       Attributes

  FF           36x10x64            67520  ndSparse    sparse    
  Result      360x64               12312  double      sparse    
  TT            1x10x64             2384  ndSparse    sparse    

[Amit Chakraborty]

Thank u so much @Matt J!!!!