Financial Toolbox

Referencing Matrix Elements

To reference specific matrix elements use (row, column) notation. For example,

• Bonds(1,2)
  
  ans =
  
            0.06
  
  Cash(3)
  
  ans =
  
         5280.00
  

You can enlarge matrices using small matrices or vectors as elements. For example,

• AddBond = [1000   0.065   2];
  Bonds = [Bonds; AddBond]
  

adds another row to the matrix and creates

• Bonds =
  
         1000   0.06    2
          500   0.055   4
         1000   0.065   2
  

Likewise,

• Prices = [987.50
            475.00
            995.00]
  
  Bonds = [Prices, Bonds]
  

adds another column and creates

• Bonds =
  
      987.50   1000   0.06    2
      475.00    500   0.055   4
      995.00   1000   0.065   2
  

Finally, the colon (:) is important in generating and referencing matrix elements. For example, to reference the par value, coupon rate, and coupon frequency of the second bond.

• BondItems = Bonds(2, 2:4)
  
  BondItems =
  
      500.00   0.055   4
  

Using Matrix Functions for Finance

Transposing Matrices