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Detailed explanation of the introduction and usage of rand function

不言Original: 2018-05-09 15:46:318219browse

The following is a detailed explanation of the difference between numpy.random.randn() and rand(). It has a good reference value and I hope it will be helpful to everyone. Let’s take a look. There are some commonly used functions in numpy to generate random numbers, randn() and rand() are among them. numpy.random.randn(d0, d1, …, dn) returns one or more sample values from the standard normal distribution. The random sample of numpy.random.rand(d0, d1, …, dn) is in [0, 1). import numpy as np arr1 = np.random.randn(2,4) print(arr1) print('************************************************ *******************') arr2

1. Detailed explanation based on the difference between numpy.random.randn() and rand()

Introduction: The following is for everyone Share a detailed explanation based on the difference between numpy.random.randn() and rand(). It has a good reference value and I hope it will be helpful to everyone. Let’s take a look together

2. Detailed explanation of safe examples of mt_rand() random numbers in PHP

Detailed explanation of the introduction and usage of rand function

Introduction: A lot of security vulnerabilities related to mt_rand() were discovered some time ago, and they were basically caused by misunderstanding the usage of random numbers. Here I would like to mention another pitfall of the PHP official website manual. Take a look at the introduction to mt_rand(): Chinese version ^cn English version ^en. You can see that the English version has an extra yellow Caution warning. mt_rand() uses the mersennetwister algorithm to return random integers. Everyone knows this, but the following article mainly introduces you to the relevant information about the security of mt_rand() random numbers in PHP. The introduction in the article is very detailed. Friends who need it can refer to it. For reference, let’s learn with the editor below.

3. Detailed explanation of Python’s random module

Introduction: This article mainly introduces the relevant content of Python’s random module. It has certain reference value. Friends who need it can refer to it. I hope it can help everyone.

4. php random number generated rand() function

Introduction: I believe everyone is familiar with the rand() function It is not unfamiliar. Many friends have come to this function during the development process. They all know that this function generates PHP random numbers. The rand() function returns an integer of PHP random numbers! Today I will take you to learn more about the rand() function of random number generation in PHP!

5. php randomly selects one or more elements from the array and returns the key name function array_rand()

Introduction: The array_rand() function returns a random key name in the array, or if the specified function returns more than one key name, returns an array containing random key names.

6. php function array_rand that rearranges the elements in the array in random order

Introduction: random extraction It is to scramble the elements of the original array and output them. This means that after each execution, the order or elements extracted are different. This function can be used to display different advertisements on the web page each time. Use the array_rand() function to implement the array. Random extraction:

7. In-depth understanding of mt_rand() random number security in php

Detailed explanation of the introduction and usage of rand function

Introduction: mt_rand() uses the mersennetwister algorithm to return random integers. Everyone knows this, but the following article mainly introduces you to the security of mt_rand() random numbers in PHP. The information is introduced in great detail in the article. Friends who need it can refer to it. Let’s learn together with the editor.

8. Introduction to Java’s method of using Math.random() combined with the Monte Carlo method to calculate the pi value

Detailed explanation of the introduction and usage of rand function ##

Introduction: This article mainly introduces how Java uses Math.random() combined with the Monte Carlo method to calculate the pi value. It briefly explains the principle of the Monte Carlo method combined with specific examples, and combines the specific example forms. Analyzed the operation skills of Java using Monte Carlo method to calculate PI value. Friends in need can refer to

9. How to use Math.random() and Monte Carlo in Java Method to calculate the case of pi value

Detailed explanation of the introduction and usage of rand function

##Introduction: This article mainly introduces the use of Math.random( in Java ) combined with the Monte Carlo method to calculate the PI value, briefly explains the principle of the Monte Carlo method combined with specific examples, and combines the specific examples to analyze the operating skills of Java using the Monte Carlo method to calculate the PI value. Friends in need can refer to Next

10. Explanation of methods and principles of java.util.Random implementation

Detailed explanation of the introduction and usage of rand function

Introduction: The class java.util.Random in the Java utility class library provides methods for generating various types of random numbers. The following article mainly introduces you to java.util The relevant information on the implementation principle of .Random is introduced in detail through sample code in this article. Friends in need can refer to it.

11. Comparison of the differences between the php rand() function and the mt_rand() function

Introduction: mt_rand() Four times faster than rand(), many old libc random number generators have some uncertain and unknown characteristics and are very slow. PHP's rand() function uses the libc random number generator by default. The mt_rand() function is informally used to replace it.

12. Comparison of the differences between rand() function and mt_rand() function in php

Introduction: mt_rand( ) is four times faster than rand(). Many old libc random number generators have some uncertain and unknown characteristics and are very slow. PHP's rand() function uses the libc random number generator by default. The mt_rand() function is informally used to replace it.

13. php function mt_rand() and rand() performance test comparison example detailed explanation

Detailed explanation of the introduction and usage of rand function

Introduction: This article uses examples to compare and analyze the performance issues of random functions mt_rand() and rand() in PHP. Share it with everyone for your reference. The specific analysis is as follows: In php, the mt_rand() and rand() functions can randomly generate a pure number. They both require us to set the seed data and then generate it, then

14. JAVA’s Random class, array learning

Introduction: Random tool class Function: Generate a random number Usage steps: 1. Import the corresponding package import java.util.Random; 2. Create a reference type variable data type variable name = new data type (); Random rd = new Random(); 3. Call the function variable name. The function generates a random integer in the range [0,n), and generates a random integer that contains 0, but does not

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Detailed explanation of the introduction and usage of rand function

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