Matlab Vector and Matrix

Vector : A list of objects. Generally, the object is a number. There are row vector and column vector.

A row vector is expressed as [1,2,3,4,5] and a column vector is expressed as [1;2;3;4;5];

The notation of vector is []. The index or subscript starts from 1 and the transpose operation ( ' ) can be used to switch the row vector to the column vector, and vise visa.

Initial a vector.

>> A = [1:10]

A =

1 2 3 4 5 6 7 8 9 10

index the vector with 2:2:8

>> A(2:2:8)

ans =

2 4 6 8

Matrix : A matrix is a rectangular array of numbers (or objects).

M = [1,2,3;4,5,6;7,8,9];

This is a 3x3 matrix. M(1,1)=1 and M(3,3) = 9.

Index: colon notation (:)

>> M = [1,2,3;4,5,6;7,8,9];

>> M(1:2,2:3)

ans =

2 3

5 6

>> M(1:2,:)

ans =

1 2 3

4 5 6

The basic operations can be directly used to Vector and Matrix computations.