numpy.poly() in Python Last Updated : 04 Dec, 2020 Comments Improve Suggest changes Like Article Like Report The numpy.poly() function in the Sequence of roots of the polynomial returns the coefficient of the polynomial. Syntax :numpy.poly(seq) Parameters : Seq : sequence of roots of the polynomial roots, or a matrix of roots. Return: 1D array having coefficients of the polynomial from the highest degree to the lowest one. c[0] * x**(N) + c[1] * x**(N-1) + ... + c[N-1] * x + c[N] where c[0] always equals 1. Python3 1== # Python code explaining # numpy.poly() # importing libraries import numpy as np # Giving the roots seq_1 = (2, 1, 0) a = np.poly(seq_1) print ("Coefficients of the polynomial: ", a) # Constructing polynomial p1 = np.poly1d(a) print ("\nAbove polynomial = \n", p1) Output : Coefficients of the polynomial: [ 1. -3. 2. 0.] Above polynomial = 3 2 1 x - 3 x + 2 x Code #2: Python3 # Python code explaining # numpy.poly() # importing libraries import numpy as np # Giving the roots seq_2 = (2, 1, 0, 2, 4, 2) b = np.poly(seq_2) print ("Coefficients of the polynomial: ", b) # Constructing polynomial p2 = np.poly1d(b) print ("\nAbove polynomial = \n", p2) Output : Coefficients of the polynomial: [ 1. -11. 46. -92. 88. -32. 0.] Above polynomial = 6 5 4 3 2 1 x - 11 x + 46 x - 92 x + 88 x - 32 x Create Quiz Comment M mohit gupta_omg :) Follow 0 Improve M mohit gupta_omg :) Follow 0 Improve Article Tags : Python Python-numpy Python numpy-polynomials Explore Python FundamentalsPython Introduction 2 min read Input and Output in Python 4 min read Python Variables 4 min read Python Operators 4 min read Python Keywords 2 min read Python Data Types 8 min read Conditional Statements in Python 3 min read Loops in Python - For, While and Nested Loops 5 min read Python Functions 5 min read Recursion in Python 4 min read Python Lambda Functions 5 min read Python Data StructuresPython String 5 min read Python Lists 4 min read Python Tuples 4 min read Python Dictionary 3 min read Python Sets 6 min read Python Arrays 7 min read List Comprehension in Python 4 min read Advanced PythonPython OOP Concepts 11 min read Python Exception Handling 5 min read File Handling in Python 4 min read Python Database Tutorial 4 min read Python MongoDB Tutorial 3 min read Python MySQL 9 min read Python Packages 10 min read Python Modules 3 min read Python DSA Libraries 15 min read List of Python GUI Library and Packages 3 min read Data Science with PythonNumPy Tutorial - Python Library 3 min read Pandas Tutorial 4 min read Matplotlib Tutorial 5 min read Python Seaborn Tutorial 3 min read StatsModel Library - Tutorial 3 min read Learning Model Building in Scikit-learn 6 min read TensorFlow Tutorial 2 min read PyTorch Tutorial 6 min read Web Development with PythonFlask Tutorial 8 min read Django Tutorial | Learn Django Framework 7 min read Django ORM - Inserting, Updating & Deleting Data 4 min read Templating With Jinja2 in Flask 6 min read Django Templates 5 min read Build a REST API using Flask - Python 3 min read Building a Simple API with Django REST Framework 3 min read Python PracticePython Quiz 1 min read Python Coding Practice 1 min read Python Interview Questions and Answers 15+ min read Like