Lecture7

Lecture 7

Solving linear equation

Eng. Mohamed Awni

Electrical & Computer Engineering

Dept.

Agenda

2

Relational Operators

Determinant & inverse of a matrix

Solving linear equations

Exercise


Relational operators Produce logical values (true OR false) (One or zero)

>> 5>2 ans = 1

>> 5<4 ans = 0

>> 1.5<=1.5 ans = 1

>> 2>=pi

ans = 0

ans = 0 >> 1.8==1.801

• When relational operators are used on arrays, the relational operator is applied element-by-element


• Produces a logical array with the same dimensions as the original operands

5

Relational Operators in images


det(v) • Return the determinant of the square matrix. • Matrix must be square

• Matrix must be square

Inv (v) • Is a matrix such that when multiplied on the right or on the

left by the given matrix, yields the identity matrix; I


For a square matrix to have an inverse, its determinant must be non- zero value,

Solving linear equations

Solving system of linear equations using the inv() function

Raise the power of A to -1

left division (\) operator

Exercises