Matrix theory basics 2.5 basic matrix calculation using Matlab

Section 5 basic matrix calculation using Matlab

MATLAB mathematical software can perform various complex operations on the matrix. Below are some examples of simple operations.

Example 18: generate a matrix. Set

Solution: MATLAB has many functions to generate different types of matrices. When you input the following commands in the MATLAB window, all elements of the matrix must be in a pair of square brackets, different elements in the same row are separated by commas (,) or spaces, and different rows are separated by semicolons (;). If you do not end with a semicolon after the input, the input content is not displayed and ended with a semicolon, displays the input result immediately.

> A = [, 7;-, 9;, 1]

A =

> B = [3; 1; 4]

> C = [2, 0,-1]

C =

Example 19 known

Solution: Enter the following command in the MATLAB window:

> A = [1,-; 2,-; 3,-];

> B = [3,-;, 1; 1,-];

> X = a + B

X =

> Y = AB

Y =

Example 20

Solution: Enter the following command in the MATLAB window:

> A = [3,-,-1;,; 1,-, 2;,];

> DETA ------ the determinant function of the matrix is det ()

Ans = 4

> A' ------ calculate the transpose of the matrix. Use single quotation marks directly and use a' instead of

Ans =

> Inv (a) ------ calculate the Inverse Matrix Function of the matrix as inv ()

Ans =

> A ^ 2

Ans =