EGR 301 HW 1:  Matlab Review ANSWERS

Problem #1:  Circuit analysis by inspection
R =  6    -2     0      % input data, derived from circuit inspection
    -2    12    -2
     0    -2     7
V = 12                  % input data, derived from circuit inspection
    -8
   -20

I = 1.6991              % Answer: i1, i2 and i3
   -0.9027
   -3.1150

   
Problem #2:  Matrix manipulation
A =  1     2     3     4    % initial matrix, different for each person
     2     3     4     5
     6     7     8     9
     5     6     3     2

B  = 1     2     3     4    % Row 3 removed from matrix A
     2     3     4     5
     5     6     3     2

C =  1     2                % Columns 1 and 2 from matrix A
     2     3
     6     7
     5     6

D =  3     4                % Center 4 elements from matrix A
     7     8

E =  1     0     0     0    % Diagonal matrix of matrix A's diagonal elements
     0     3     0     0
     0     0     8     0
     0     0     0     2

F = 2.0000                  % Column vector of specified data points
    2.5000
    3.0000
    3.5000
    4.0000
    4.5000
    5.0000