4 basic mathematics operations

5 + 7 ans = 12

8 - 3 ans = 5

6 * 3 ans = 18

1/3 ans = 0.33333

2^4 ans = 16

3 basic logistics operations

1 ~= 2 ans = 1

1 == 2 ans = 0

1 &&0 ans = 0

1 || 4 ans = 1

xor(1, 0) ans = 1

The basic uses for variables

a = 3 a = 3

a = 5; % semicolon suppressing output

a = ‘hi’ a = hi

a = pi a = 3.1416

disp(a) 3.1416

disp(sprintf(‘2 decimals: %0.2f’, a)) 2 decimals: 3.14

format long a a = 3.141592653589793

a = [1 2; 3 4; 5 6] a = 1 2 3 4 5 6

v = [1 2 4] v = 1 2 4

(v’)’ ans = 1 2 4

v = 1:0.1:2 v = Columns 1 through 4: 1.000000000000000 1.100000000000000 1.200000000000000 1.300000000000000 Columns 5 through 8: 1.400000000000000 1.500000000000000 1.600000000000000 1.700000000000000 Columns 9 through 11: 1.800000000000000 1.900000000000000 2.000000000000000

v =- 1:5 v = -1 0 1 2 3 4 5

ones(2, 3) ans = 1 1 1 1 1 1

c = 2 * ones(2, 3) c = 2 2 2 2 2 2

eye(3) ans = Diagonal Matrix 1 0 0 0 1 0 0 0 1

rand(3, 3) ans = 0.411327 0.048251 0.520388 0.436561 0.625215 0.394285 0.543362 0.511269 0.920021

randn(1, 3) ans = 1.53855 -0.72854 -0.19124