EDUğ A = [1 0;1 1;1 2]

A =

     1     0
     1     1
     1     2

EDUğ b = [6 0 0]'

b =

     6
     0
     0

EDUğ A'

ans =

     1     1     1
     0     1     2

EDUğ A'*A\A'*b

ans =

    5.0000
   -3.0000

EDUğ cd a:\Tcodes
% change working directory to a subdirectory a:\Tcodes

EDUğ help linefit
% on-line help for fitting a straight line

  linefit  Plot the least squares fit by a line.
 
  linefit(t, b), where t and b are vectors of the same length,
  displays the best line fit to the data points (t(i), b(i)).

EDUğ t=[0 1 2]
%Example 1 of page 184

t =

     0     1     2

EDUğ b=[6 0 0]

b =

     6     0     0

EDUğ linefit(t,b)