random.normalvariate() function in Python

random.lognormvariate() function in Python

Last Updated : 26 May, 2020

random module is used to generate random numbers in Python. Not actually random, rather this is used to generate pseudo-random numbers. That implies that these randomly generated numbers can be determined.

random.lognormvariate()

lognormvariate() is an inbuilt method of the random module. It is used to return a random floating point number with log-normal distribution.

Syntax : random.lognormvariate(mu, sigma) Parameters : mu : mean sigma : standard deviation, greater than 0 Returns : a random log-normal distribution floating number

Example 1:

Python3 1==

# import the random module
import random

# determining the values of the parameters
mu = 0
sigma = 0.25

# using the lognormvariate() method
print(random.lognormvariate(mu, sigma))

Output :

0.8585439051088984

Example 2: We can generate the number multiple times and plot a graph to observe the log-normal distribution.

Python3 1==

# import the required libraries 
import random 
import matplotlib.pyplot as plt 

# store the random numbers in a  
# list 
nums = [] 
mu = 0
sigma = 0.25
  
for i in range(100): 
    temp = random.lognormvariate(mu, sigma)
    nums.append(temp) 
      
# plotting a graph 
plt.plot(nums) 
plt.show()

Output :

Example 3: We can create a histogram to observe the density of the log-normal distribution.

Python3 1==

# import the required libraries 
import random 
import matplotlib.pyplot as plt 
  
# store the random numbers in a list 
nums = [] 
mu = 0
sigma = 0.25
  
for i in range(10000): 
    temp = random.lognormvariate(mu, sigma) 
    nums.append(temp) 
      
# plotting a graph 
plt.hist(nums, bins = 200) 
plt.show()

Output :

random.normalvariate() function in Python

Y

Yash_R

Improve

Article Tags :

Practice Tags :

python

Similar Reads

Python Random Module

Python Random module generates random numbers in Python. These are pseudo-random numbers means they are not truly random. This module can be used to perform random actions such as generating random numbers, printing random a value for a list or string, etc. It is an in-built function in Python.Appli

Python - random.seed( ) method

random.seed() method in Python is used to initialize the random number generator, ensuring the same random numbers on every run. By default, Python generates different numbers each time, but using .seed() allows result reproducibility.It's most commonly used in:Machine Learning- to ensure model cons

random.getstate() in Python

random() module is used to generate random numbers in Python. Not actually random, rather this is used to generate pseudo-random numbers. That implies that these randomly generated numbers can be determined. random.getstate() The getstate() method of the random module returns an object with the curr

random.setstate() in Python

Random module is used to generate random numbers in Python. Not actually random, rather this is used to generate pseudo-random numbers. That implies that these randomly generated numbers can be determined. random.setstate() The setstate() method of the random module is used in conjugation with the g

random.getrandbits() in Python

random module is used to generate random numbers in Python. Not actually random, rather this is used to generate pseudo-random numbers. That implies that these randomly generated numbers can be determined. random.getrandbits() The getrandbits() method of the random module is used to return an intege

randrange() in Python

The randrange() function in Python's random module is used to generate a random number within a specified range. It allows defining a start, stop, and an optional step value to control the selection of numbers. Unlike randint(), which includes the upper limit, randrange() excludes the stop value. Ex

randint() Function in Python

randint() is an inbuilt function of the random module in Python3. The random module gives access to various useful functions one of them being able to generate random numbers, which is randint(). In this article, we will learn about randint in Python.Python randint() Method SyntaxSyntax: randint(sta

Python Numbers | choice() function

choice() is an inbuilt function in Python programming language that returns a random item from a list, tuple, or string. Syntax: random.choice(sequence) Parameters: sequence is a mandatory parameter that can be a list, tuple, or string. Returns: The choice() returns a random item. Note:We have to im

Python - random.choices() method

The choices() method returns multiple random elements from the list with replacement. Unlike random.choice(), which selects a single item, random.choices() allows us to select multiple items making it particularly useful for tasks like sampling from a population or generating random data.Example:Pyt

random.sample() function - Python

sample() is an built-in function of random module in Python that returns a particular length list of items chosen from the sequence i.e. list, tuple, string or set. Used for random sampling without replacement. Example:Pythonfrom random import sample a = [1, 2, 3, 4, 5] print(sample(a,3))Output[2, 5