Vectors And Matrices

Question 0

linspace (x, y, n)

Answer 0

Creates a linearly spaced vector.
x = start
y = end
n = step

Question 1

Creating vectors v = x y z

Answer 1

v = [x y z]
v = [x,y,z]
v = x:z

Question 2

logspace (x, y, n)

Answer 2

Creates a logarithmically spaced function
10^x = start
10^y = end
n = number of elements

Question 3

Indexing

vec (x)

Answer 3

Returns the x element in vector vec

Question 4

vec (x:y)

Answer 4

Returns elements from x to y inclusive.

Question 5

vec (x) = y

Answer 5

Sets x-th element to y

Question 6

Creating column vectors

Answer 6

v = [x;y;z]
v = [x,y,z]'

Question 7

Creating matrices

Answer 7

mat = [a,b,c; x,y,z]
mat = [a b c; x y z]

Question 8

rand (n)

Answer 8

Creates an n x n matrix of random numbers between 0 and 1.

Question 9

rand (m, n)

Answer 9

Creates an m x n matrix of random numbers between 0 and 1.

Question 10

randi ([intmin, intmax], m, n)

Answer 10

Creates an m x n matrix of random integers between intmin and intmax inclusive.

Question 11

zeros (m, n)

Answer 11

Creates an m x n matrix of zeros.

Question 12

ones (m, n)

Answer 12

Creates an m x n matrix of ones.

Question 13

mat (x, :)

Answer 13

Refers to the x-th row

Question 14

mat (:, x)

Answer 14

Refers to the x-th column.

Question 15

mat’

Answer 15

Returns the transpose of mat