The numpy library is one of the most popular scientific computing libraries in Python. It provides fast operations on multi-dimensional arrays and matrices, and supports a variety of mathematical operations, linear algebra operations, and Random number generation and other functions. Mastering the basic operations and common functions of numpy can not only improve the efficiency of data analysis and scientific computing, but also assist the development of fields such as data visualization and machine learning.
This article will introduce the basic operations and common functions of the numpy library, including the creation, indexing and slicing of numpy arrays, array operations, statistical functions, linear algebra operations and random number generation. Specific code examples are also provided to help readers get started quickly.
The most basic way to create a numpy array is to use the numpy.array() function, which receives a list or tuple as a parameter and creates a numpy array. The following is a simple example:
1 2 3 4 |
|
The output result is:
1 |
|
In addition, numpy has some other functions for creating arrays, such as:
Similar to lists in Python, numpy arrays can also use indexing and slicing operations. Here are a few examples:
1 2 3 4 5 6 7 8 9 10 11 |
|
Note that in numpy arrays, the slicing operation returns a view of the original array rather than a new array. Therefore, when modifications are made to the slice, the original array also changes.
numpy array supports a variety of mathematical operations, such as addition, subtraction, multiplication, division, as well as polynomial functions, trigonometric functions, etc. The following are some common array operations:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 |
|
numpy also provides a large number of statistical functions, such as sum, mean, standard deviation, maximum and minimum, etc. The following are some common statistical functions:
1 2 3 4 5 6 7 8 9 10 11 12 |
|
numpy provides a wealth of linear algebra operation functions, such as matrix multiplication, determinant calculation, eigenvalues and eigenvectors Calculation etc. The following are some common linear algebra operations:
1 2 3 4 5 6 7 8 9 10 11 12 |
|
numpy provides a variety of random functions, such as generating random integers, generating normal distributed random numbers, and generating specified shapes random array, etc. The following are some common random functions:
1 2 3 4 5 6 7 |
|
The above is an introduction and code examples of the basic operations and common functions of the numpy library. I hope this article can help readers get started quickly and become proficient in the use of numpy.
The above is the detailed content of From entry to proficiency: Master the basic operations and common functions of the numpy library. For more information, please follow other related articles on the PHP Chinese website!