p5.js randomGaussian() Function

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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.

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.

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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