Matlab basic example

 1. Defining a row matrix and performing operations on it

Assume that you want to evaluate the function f(x) = x^3-6x^2 + 3

at different values of x. This can be accomplished with two lines of

MATLAB code.

% Define the values of x

x = 0:0.01:1;

% Evaluate f

f = x .^ 3 - 6 * x .^ 2 + 3;

In this example, x varies between 0 and 1 in steps of 0.01. Comments

are preceded by a % sign. The symbols ˆ and * stand for the power and

multiplication operators respectively. The dot in front of ˆ n indicates

that each entry of the row matrix x is raised to the power n. In the

absence of this dot, MATLAB would try to take the nth power of x,

and an error message would be produced since x is not a square matrix.

A semicolon at the end of a command line indicates that the output

should not be printed on the screen.


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