• Vectors

a = [1 2 3 4 5 6 9 8 7]

• Matrices

Are entered as

A = [1 2 3 4;5 6 7 8;9 10 11 12] semi-colon seperates the rows

and shows up as :

   A =
        1    2    3     4
        5    6    7     8
        9   10   11    12

To generate a random matrix use rand(N,M) to give an NxM matirx.

  >> rand(3,5)
  ans =
      0.8147    0.9134    0.2785    0.9649    0.9572
      0.9058    0.6324    0.5469    0.1576    0.4854
      0.1270    0.0975    0.9575    0.9706    0.8003

use eye(N) to generate the NxN identity matrix

  >> eye(3)
  ans =
       1     0     0
       0     1     0
       0     0     1

• Plotting

Functions of one variable

To make a graph of y = sin(x) on the interval x = 0 to x = 10 we do the following:

>> x = 0:.3:10;
>> y = sin(x);
>> plot(x,y)

or x=0 to 2*pi

>> x = 0:.3:2*pi;
>> y = sin(x);
>> plot(x,y)