The randomExponential() function is used to return a function that generates the random number based on the exponential distribution.
Syntax:
d3.randomExponential(lambda);
Parameters: It takes only one parameter that is given above and described below.
- lambda: It is the rate of the exponential distribution function which is equal to the time between events in a Poisson process.
Returns: It returns a function.
Note: The value of the output may be different each time the function is run.
Below given are a few examples of the above function.
Example 1: When lambda is greater than one.
html
<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <meta name="viewport"         content="width=device-width,                 initial-scale=1.0">  <title>Document</title></head><style></style><body>  <!-- Fetching from CDN of D3.js -->  <script type = "text/javascript"          src = "https://d3js.org/d3.v4.min.js">  </script>  <script>    /* The value of the output may be different each time the function is run.*/    console.log(d3.randomExponential(5)())    console.log(d3.randomExponential(5)())    console.log(d3.randomExponential(5)())    console.log(d3.randomExponential(5)())    console.log(d3.randomExponential(5)())  </script></body></html> |
Output:
Example 2: When the value of lambda is less than one.
html
<!DOCTYPE html><html lang="en"><head>  <meta charset="UTF-8">  <meta name="viewport"         content="width=device-width,                  initial-scale=1.0">  <title>Document</title></head><style></style><body>  <!-- Fetching from CDN of D3.js -->  <script type = "text/javascript"           src = "https://d3js.org/d3.v4.min.js">  </script>  <script>    /* The value of the output may be different each time the function is run.*/    console.log(d3.randomExponential(0.5)())/* Smaller the lambda greater the random value generated.    console.log(d3.randomExponential(0.05)())    console.log(d3.randomExponential(0.005)())    console.log(d3.randomExponential(0.0005)())  </script></body></html> |
Output:
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