Scalar, Vector and Matrices

SCALAR, VECTOR AND MATRICES

Scalar	Real Numbers	a = 5
Vector	A collection of numbers arranged in : column (column vector) row (row vector)	column vector :   row vector :
Matrix	Ordered set of scalars arranged in a  rectangular pattern.	A=

• Scalar:

>> a = 5 

a =
     5

• Row vector:

>> b = [1 2 3] 

b =
     1     2     3

• Column vector:

>> c = [1;2;3] 

c =

1


2


3

• Matrix:

>> A = [1 2 3; 4 5 6; 7 8 9] 

A =

1     2     3


4     5     6


7     8     9

• To display number of rows and column of the matrix:

>> size(A) 

ans =
     3     3

>> [row, column] = size(A)

row =
     3
column =
     3 

>> [row, column] = size(c)

row =
     3
column =
     1

• To list the elements in certain row or column

>> C = A(3 , :) 

C =
     7     8     9

>> D = A(: , 3) 

D =

3


6


9