3.10 Introduction to NumPy

-

      Introduction to NUMPY: -

  • NumPy stands for Numerical Python.
  • It is a Python library used for scientific and mathematical computing.
  • It provides support for large, multi-dimensional arrays and matrices, along with a collection of mathematical functions to operate on them.
  • It is faster than regular Python lists.
  • It uses less memory.
  • It is compatible with many data science libraries (like Pandas, Matplotlib, SciPy, etc.).

 

         Features of NumPy: - NumPy has various useful features:

  • It contains N-dimensional array object.
  • It is compatible with many hardware and platforms.
  •  It has a tool that enable integration with FORTRAN, C or C++ code.
  • It can perform high-level mathematical functions like statistics, sorting, searching linear algebra and etc.
  • It supports scientific and financial calculations.

 

         Installing NUMPY: - to install NumPy, we have to follow below steps:

  • Step 1: - open command prompt.
  • Step 2: - write command “py – m pip install numpy”.
  • Step 3: - don’t close the window until the installation complete.
  • This command will search for latest version of NumPy on the internet and download it.

 

      Creating NumPy arrays: -

  • NumPy means creating homogenous n-dimensional arrays.
  • All the elements of NumPy array should be of same type.
  • It is designed to deal with large arrays.
  • To use arrays in python, we need to import the “NumPy” module.



  • Here, “numpy” represents the module name. “np” is an alias name for “numpy”.
  • After importing NumPy module, it can able to get any class and object of the module and array class from “numpy” module.
  • NumPy provides many functions to create arrays. To create array in python we use most frequently used functions.

                1. Creating arrays using array( ) function.

                2. Creating array using arrange( ) function.

 

        1) Creating arrays using array( ) function: -

  • The function array( ) of NumPy module is used to create an array.
  • It converts a list to an array.
  • We should take only same type of data.

         Example 1: - one dimensional array


Output: -


Example 2: - two-dimensional array


Output: -


Example 3: - shape of an array


Output: -


        2) Creating array using arrange( ) function: -

  • The arrange( ) function create arrays with regularly incrementing values.
  • It returns evenly spaced values in the given interval.
  • It is similar to python range( ) function.
  • The format of the function is as:


  • Start: - The starting value. If omitted, defaults to 0.
  • Stop: - The ending value. (not including this number)
  • Step: - spacing between values, default is 1.

 

        Example: -

   Output: -



Popular posts from this blog

operators in c programming

-
Image
v Operators: - An operator is a symbol that tells or intimates to the compiler to perform specific calculations or manipulations on one or more operands. Operators are essential for performing computations and making decisions in programs.   a + b is an operation a & b are operands + is an operator   Based on number of operands involved: 1.      Unary operators: - unary operators can be applied on only one operator. Example: -   ++ , -- , - (unary minus) , sizeof , ~ (compliment) , ! (not).   2.      Binary operators: - binary operators can be applied on two operands. Example: -   + , -,   * , / , etc.   3.    Ternary operators: - Ternary operator can be applied on three operands. Example: -   ?: (ternary conditional operator).   C supports several operators, can be classified into following...
Read more

Variables in c

-
Image
  Variables: - A variable is a data name or an identifier which stores a value that can be changed during the program execution.  Every variable might belong to any of the data types, like int, float, char, etc.  The name of a variable can be composed of letters, digits, and the underscore character. It must begin with either a letter or an underscore.  Variables are case-sensitive because uppercase and lowercase letters are distinct. C programming language also allows defining various other types of variables, like numeric array, character array, pointer, Structure, Union, Enumeration and etc.               Example: - sum, height, _value Declaring a variable in C: - Variable declaration means telling the compiler about the name and type of a variable before using it in the program. Variable declaration is the process of reserving a memory location and defining the type of data that will be stored in that locatio...
Read more

2.4 Arrays in c programming

-
Image
  Arrays: - An array is a collection of elements of the same data type stored in contiguous memory locations. It is a derived data type and a homogenous data structure. It is a variable which can store multiple values of the same type under a single variable name, making it easier to manage and manipulate related data. The size of an array is fixed. To access the elements of an array, we use indexes or subscripts accordingly. array index or subscript is used to identify array elements address. Array index or subscript starts with 0 to n-1.   Declaration of an array: - The declaration of an array means telling the compiler to create an array variable and reserving memory for a fixed number of elements of the same data type. Initialization of an array: - Initializing an array means assigning initial values to its elements. Types of arrays: - Arrays are classified based on the number of dimensions they have:             ...
Read more