prime_sieve | understandable prime sieve implementation in numpy or pure | Data Manipulation library

by mCodingLLC Python Version: Current License: MIT

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kandi X-RAY | prime_sieve Summary

prime_sieve is a Python library typically used in Utilities, Data Manipulation, Numpy applications. prime_sieve has no bugs, it has no vulnerabilities, it has build file available, it has a Permissive License and it has low support. You can install using 'pip install prime_sieve' or download it from GitHub, PyPI.

An understandable prime sieve implementation in numpy or pure python.

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prime_sieve has a low active ecosystem.

It has 9 star(s) with 3 fork(s). There are 2 watchers for this library.

It had no major release in the last 6 months.

prime_sieve has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of prime_sieve is current.

Quality

prime_sieve has no bugs reported.

Security

prime_sieve has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

prime_sieve is licensed under the MIT License. This license is Permissive.

Permissive licenses have the least restrictions, and you can use them in most projects.

Reuse

prime_sieve releases are not available. You will need to build from source code and install.

Deployable package is available in PyPI.

Build file is available. You can build the component from source.

Top functions reviewed by kandi - BETA

kandi has reviewed prime_sieve and discovered the below as its top functions. This is intended to give you an instant insight into prime_sieve implemented functionality, and help decide if they suit your requirements.

Extend at most n segments
Find the smallest multiple of n geometries

Get all kandi verified functions for this library.

prime_sieve Key Features

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prime_sieve Examples and Code Snippets

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Community Discussions

Trending Discussions on prime_sieve

is there any kind of error in my code as it is not giving correct output

python "IndexError: index 8 is out of bounds for axis 0 with size 8"

Prime Sieve algorithm in Python : Help Explaining

Non-deterministic CUDA C kernel

Printing out prime numbers based on a previous function in python

QUESTION

is there any kind of error in my code as it is not giving correct output

Asked 2020-May-23 at 05:53

#include 
#include 
#include 
#include 
using namespace std;
typedef long long int ll;
void prime_sieve(vector p, int n)
{
    //first mark all odd number's prime
    p[2] = 1;
    p[1] = p[0] = 0;
    for (int i = 3; i <= n; i += 2)
    {
        p[i] = 1;
    }
    //sieve
    for (ll i = 3; i <= n; i += 2)
    {
        //if the current number is not marked (it is prime)
        if (p[i] == 1)
        {
            //mark all the multiples of i as not prime
            for (ll j = i * i; j <= n; j = j + i)
            {
                p[j] = 0;
            }
        }
    }
    //special cases so e have to mention then individually
}
int main()
{
    int n;
    cin >> n;
    vector p(n + 1);
    prime_sieve(p, n + 1);
    for (int i = 0; i <= n; i++)
    {
        if (p[i] == 1)
            cout << i << " ";
    }
    return 0;
}

...

ANSWER

Answered 2020-May-23 at 05:53

You have a vector out of bounds error (and other errors)

In your function

Source https://stackoverflow.com/questions/61967964

QUESTION

python "IndexError: index 8 is out of bounds for axis 0 with size 8"

Asked 2019-Mar-08 at 10:17

The problem requires me to write a function that compiles a list of prime numbers from the output of a given function that gives 2 lists, one list of numbers from 2 to an arbitrary number and a second list that matches the numbers in the first list with "true" or "False" values depending on whether the numbers in the first list are prime or not.

I have no idea whether my code is just fundamentally wrong to answer the question, or if I am on the right track and just made an error...

Any help would be immensely appreciated.

The question:

Write a function (called primes_list) that takes a single input N. This function must make use of the prime_sieve function to compute and return an array (or list) of only prime numbers less than or equal to N+1.

For example, if N=8 this function should return [2,3,5,7]

the given code:

...

ANSWER

Answered 2019-Mar-08 at 10:17

Your n, that you use to slice your list mask is a list of numbers that are not suitable for index (since it will always contain N, N+1, while last index of mask is N-1).

Also, the second list mask contains Bool not str, so your comparison of mask[n] == 'true' will always return False.

With above points in mind, your primes_list can be:

Source https://stackoverflow.com/questions/55060891

QUESTION

Prime Sieve algorithm in Python : Help Explaining

Asked 2017-Dec-01 at 21:04

I came across this prime sieve using the enumerate function which I vaguely understand, I understand the general idea behind the code, i.e. turning all the non-prime values in the list of 'True' to 'False' and then out of that creating a prime list. But I'm not exactly sure how to interpret the code after line 5, is is_prime a function or a variable? I'm slightly confused

...

ANSWER

Answered 2017-Dec-01 at 20:40

try this:

Source https://stackoverflow.com/questions/47601029

QUESTION

Non-deterministic CUDA C kernel

Asked 2017-Jul-12 at 22:03

I'm still a beginner with CUDA and I have been trying to write a simple kernel to perform a parallel prime sieve on the GPU. Originally I had written my code in C but I wanted to investigate the speed up on a GPU so I rewrote it:

41.cu

...

ANSWER

Answered 2017-Jul-12 at 22:03

There is a giant race-condition

So prime[i] > 0 means prime, while prime[i]=0 means composite.

primes[i] = i; is executed as first update on primes by each thread. Keep this in mind.

Now let's see what happen when thread 16 executes. It marks primes[16]=16 and and all multiples of 16 too. Something like the following

Source https://stackoverflow.com/questions/45067835

QUESTION

Printing out prime numbers based on a previous function in python

Asked 2017-Mar-07 at 20:40

I have a function called prime_sieve(N) in python, and this function assigns a 0 to a number if it is not a prime number and 1 if it is a prime number - it is called mask. This function works properly. The problem is in the 2nd function below the code for prime_sieve(N) and the code is:

...

ANSWER

Answered 2017-Mar-07 at 20:31

return immediately exits the function and gives you whatever the value is at that point.

Try for example,

Source https://stackoverflow.com/questions/42657528

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install prime_sieve

You can install using 'pip install prime_sieve' or download it from GitHub, PyPI.
You can use prime_sieve like any standard Python library. You will need to make sure that you have a development environment consisting of a Python distribution including header files, a compiler, pip, and git installed. Make sure that your pip, setuptools, and wheel are up to date. When using pip it is generally recommended to install packages in a virtual environment to avoid changes to the system.

Support

For any new features, suggestions and bugs create an issue on GitHub. If you have any questions check and ask questions on community page Stack Overflow .

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