p5.js randomGaussian() Function

Last Updated : 23 Aug, 2023
The randomGaussian() function in p5.js is used to return a random value fitting a Gaussian or normal distribution for which mean and standard deviation are given as the parameter. Syntax: 
randomGaussian( Mean, StandardDeviation )
Parameters: This function accepts two parameters as mentioned above and described below:
  • Mean: It is the mean of generated random value.
  • StandardDeviation: It is the Standard Deviation of generated random value.
Note:
  • If one argument is passed as the parameter it means that the mean and standard deviation is 1.
  • If two argument is passed as the parameter it means that first is mean and second is a standard deviation.
  • If no argument is passed as the parameter it means that mean is 0 and the standard deviation is 1.
Return Value: It returns a random number. Below programs illustrate the randomGaussain() function in p5.js: Example 1: This example uses randomGaussian() function return the random value for which mean and standard deviation is given as the parameter. javascript 
function setup() { 
  
    // Creating Canvas size
    createCanvas(550, 140); 
      
    // Set the background color 
    background(220); 
   
    // Calling to randomSeed() function
    // It is used for getting constant random
    // values each time the code is run
    randomSeed(9)
     
    // Calling to randomGaussian() function
    // with mean and sd parameters
    let A = randomGaussian(1, 2);
    let B = randomGaussian(0, 1);
    let C = randomGaussian(2);
    let D = randomGaussian(2, 10);
     
    // Set the size of text 
    textSize(16); 
      
    // Set the text color 
    fill(color('red')); 
    
    // Getting random number
    text("Random number is: " + A, 50, 30);
    text("Random number is: " + B, 50, 60);
    text("Random number is: " + C, 50, 90);
    text("Random number is: " + D, 50, 110);
}
Output: Note: In the above example, the variable "C" contains one parameter i.e. mean value is 2 but the standard deviation is 1. Example 2: This example uses randomGaussian() function return the random value for which mean and standard deviation is given as the parameter. javascript 
function setup() { 
 
    // Creating Canvas size
    createCanvas(550, 140); 
     
    // Set the background color 
    background(220); 
  
    // Calling to randomSeed() function
    // It is used for getting constant random
    // values each time the code is run
    randomSeed(9)
    
    // Calling to randomGaussian() function with
    // mean and sd parameters
    let A = randomGaussian();
    let B = randomGaussian(2.5);
    let C = randomGaussian(2);
    let D = randomGaussian(20, 22.5);
    
    // Set the size of text 
    textSize(16); 
     
    // Set the text color 
    fill(color('red')); 
   
    // Getting random number
    text("Random number is: " + A, 50, 30);
    text("Random number is: " + B, 50, 60);
    text("Random number is: " + C, 50, 90);
    text("Random number is: " + D, 50, 110);
}
Output: Reference: https://p5js.org/reference/#/p5/randomGaussian
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