Scalars

• A scalar is just a 1-by-1 matrix.

  
  
  >> ones(1,1)
  ans =
  1

• Scalar operations are just special cases of matrix operations, i.e., operations on 1-by-1 matrices.

• >> 1 + 2
  
  ans =
  3
  

• A scalar operand s is treated as a matrix with the same dimensions as the other operand and the value s everywhere.

• >> 5 + ones(2,3)
  
  ans =
  6 6 6
  6 6 6
  
  >> ones(2,3) ./ 2
  ans =
  0.5000 0.5000 0.5000
  0.5000 0.5000 0.5000

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