Pandas sort index

W3Schools offers a wide range of services and products for beginners and professionals, helping millions of people everyday to learn and master new skills.

In this article, we will discuss how to sort a Pandas dataframe by both index and columns. This was the DataFrame we are using in the below codes for sorting. In this example, the DataFrame is a sorted DataFrame based on index labels and this was temporarily sorted in python language. Skip to content. Change Language. Open In App.

Pandas sort index

Python is a great language for doing data analysis, primarily because of the fantastic ecosystem of data-centric python packages. Pandas is one of those packages and makes importing and analyzing data much easier. Pandas dataframe. Basically the sorting algorithm is applied on the axis labels rather than the actual data in the dataframe and based on that the data is rearranged. We have the freedom to choose what sorting algorithm we would like to apply. Syntax: DataFrame. Choice of sorting algorithm. See also ndarray. For DataFrames, this option is only applied when sorting on a single column or label. Not implemented for MultiIndex. As we can see in the output, the index labels are already sorted i.

Last Updated : 31 Jul, All Our Services.

.

You can sort in ascending or descending order, or sort by multiple columns. The pandas version used in this article is as follows. Note that functionality may vary between versions. The following data is used as an example. When the first argument by is specified as a list, sorting is based on multiple columns. Sorting is performed in reverse order of the listed columns, with the final sort done by the first specified column. By default, sorting is in ascending order, but you can set the ascending argument to False for descending order. When sorting based on multiple columns, specifying the ascending argument as a list allows for selecting ascending or descending order for each column.

Pandas sort index

Besides sorting the data itself, sometimes we need to obtain the indices that would sort the index. Consider a Pandas Series with the index out of order. Our objective is to sort this Series by its index and additionally get the index positions that would sort the Series. This technique first resets the index, moving it into a column, and then sorts by that column. It returns a DataFrame with sorted values and original indices. This is a more manual approach but allows for additional flexibility if needed, such as custom sorting logic. By using the sorted function with a lambda, we can specify a custom sorting function—here, one that sorts the indices. Then, we use these sorted indices to rearrange the original Series. The method take is used to return the elements in the given indices along an axis.

Nm2 to mpa

See also ndarray. Free Tutorials Enjoy our free tutorials like millions of other internet users since What is an Exercise? But hurry up, because the offer is ending on 29th Feb! How to convert index in a column of the Pandas dataframe? W3Schools offers a wide range of services and products for beginners and professionals, helping millions of people everyday to learn and master new skills. Skip to content. Improve Improve. Report issue Report. Share your thoughts in the comments. Change Data Type for one or more columns in Pandas Dataframe. Work Experiences. Suggest Changes. Browser Statistics Read long term trends of browser usage. Optional, default True.

Sorting is a crucial operation in data manipulation and analysis, allowing you to organize your data for better understanding and efficiency. In Pandas, a popular Python library for data analysis, the DataFrame object comes with a variety of sorting capabilities. The syntax of the function is as follows:.

Pandas Dataframe. Skip to content. Related Articles. W3Schools Coding Game! As we can see in the output, the index labels are already sorted i. What is an Exercise? Complete Tutorials. How to Drop the Index Column in Pandas? Easy Normal Medium Hard Expert. Last Updated : 31 Jul, Share your suggestions to enhance the article. A DataFrame with the sorted result, or None if the inplace parameter is set to True. Python Crash Course. View More.