Represent a variable with probability in Matlab

조회 수: 1 (최근 30일)
popeye
popeye 2014년 9월 4일
답변: Ayush 2024년 10월 22일
Hello all,
Assume that I have an equation: y = x + n , in which:
  • y is output
  • x is input
  • n is noise
The occurrence probability of n in the equation above is just 4%. How I can represent n in matlab ?
Thanks all,

답변 (1개)

Ayush
Ayush 2024년 10월 22일
Hi,
To represent the noise “n”, given that it occurs with a probability of 4%, you can use a combination of random number generation and conditional logic. For probability check you can use the “rand()” function to generate a random number between 0 and 1, If this number is less than 0.04, you introduce noise. Refer to the example code below:
% Define the probability of noise occurrence
probability_of_noise = 0.04;
% Define the range or standard deviation of the noise if it occurs
noise_magnitude = 1; % You can adjust this as needed
% Generate a random number to decide if noise occurs
if rand() < probability_of_noise
% If noise occurs, generate noise
n = noise_magnitude * randn(); % Gaussian noise
else
% If noise does not occur, set n to zero
n = 0;
end
% Example usage with a given input x
x = 10; % Example input
y = x + n; % Calculate the output
For noise generation, I have used the “randn()” function which generates a random number from a standard normal distribution. You can scale this by a noise magnitude to adjust the level of noise.
For more information on the “rand” and “randn” functions refer to the below documentations:

카테고리

Help CenterFile Exchange에서 Random Number Generation에 대해 자세히 알아보기

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by