09-Aug-2026 13:38:45

einsum_test():
  MATLAB/Octave version 11.3.0
  einsum() carries out Einstein summation.

  matrix_column_sum_test():

  A:
   11   12   13
   21   22   23
   31   32   33
  Ac = einsum ( "ij -> j", A ):
   63
   66
   69
  matrix_diagonal_test() fails for MATLAB einsum()!

  matrix_matrix_multiplication_test():


  A:
   11   12   13
   21   22   23
  B:
   1   2
   3   4
   5   6
  AB = einsum ( "ij -> jk", A, B ):
   112   148
   202   268

  matrix_matrix_multiplication_hadamard_test():

  A:
   11   12   13
   21   22   23
  B:
   1   2   3
   4   5   6
  AB = einsum ( "ij,ij -> ij", A, B ):
    11    24    39
    84   110   138

  matrix_row_sum_test():

  A:
   11   12   13
   21   22   23
   31   32   33
  Ar = einsum ( "ij -> i", A ):
   36
   66
   96
  matrix_trace_test() fails for MATLAB einsum()!

  matrix_transpose_test():

  A:
   11   12   13
   21   22   23
  AT = einsum ( "ij -> ji", A ):
   11   21
   12   22
   13   23
  matrix_vector_multiplication_test() fails for MATLAB einsum()!
  vector_inner_product_test() fails for MATLAB einsum()!
  vector_norm_test() fails for MATLAB einsum()!
  vector_outer_product_test() fails for MATLAB einsum()!

einsum_test():
  Normal end of execution.
09-Aug-2026 13:38:45