Filters

Low Pass filter

High Pass filter

Narrow Band Pass filter

Wide Band Pass filter

Notch filter

Band Reject filter

 

dir() function

dir(name) 

attribute_name= dir(name)

• dir(name) lists files and folders that match the string name. When name is a folder, dir lists contents of the folder.

• attribute_name= dir(name) returns attributes about name.

 

disp() function

disp(x)

disp(x) displays the contents of x without printing the variable name

input() function

result = input(prompt)

str = input(prompt, 's')

• result = input(prompt) displays the prompt string on the screen, waits for input from the keyboard, evaluates any expression in the input, and returns the result.
• str = input(prompt, 's') returned the entered text as Matlab string, without evaluating expression.

length() function

 num = length(array) 

 length(array) returns length along the largest dimension of the array or matrix.

% Example

A = [101, 20;
    10, 24;
    11, 7];

%Function

ANSWER = length(A);

%Display result 

disp('Result: ');
disp(ANSWER);

Result :

3

zeros() function

X = zeros(n)

X = zeros(m, n)

• zeros(n) returns n by n matrix of zeros
• zeros(m, n) returns a m by n matrix of zeros

ones() function

X = ones(n) 

X = ones(m, n)

·         ones(n) returns n by n matrix of ones

·         ones(m, n) returns a m by n matrix of ones