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Array Operation of a Cell in Pandas

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by Abdul Rawoof A R dot icon Updated: Feb 10, 2023

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Array operations are mathematical and logical operations that can be performed on arrays, including numpy arrays and pandas DataFrames. These operations are used to manipulate and transform data and are an important part of data analysis and scientific computing. 


In pandas, you can perform various array operations on a specific cell of a DataFrame by using the ".at[]" or ".iat[]" attributes. The basic syntax for both is similar, where the first argument is the index or label of the row, and the second argument is the label or index of the column. 

  • .at[]: This attribute allows you to access a single cell of a DataFrame by using the row and column labels. 
  • .iat[]: This attribute allows you to access a single cell of a DataFrame by using the integer index of the row and column. 

Once you have accessed the cell, you can perform various array operations, such as mathematical, logical, or bitwise operations. For example, you can perform mathematical operations like +, -, *, /, ** and logical operations like ==, !=, <, >, <=, >=, &, |, ~ and bitwise operations like &, |, ^. 


For more information about the array operations of a cell in Pandas, please look at the code below. 

Fig : Preview of the output that you will get on running this code from your IDE.

Code

In this solution we're using Pandas library.

How to do array operation of a cell in Pandas

PythondotLines of Code : 12dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
import pandas as pd
from collections import Counter

df = pd.DataFrame({'id':[1,2,3],'refers':[[2,3],[1,3],[]]})
counter = dict(Counter([item for sublist in df['refers'] for item in sublist]))
df['refer_counts'] = df['id'].apply(lambda x: counter[x])

   id  refers  refer_counts
0   1  [2, 3]             1
1   2  [1, 3]             1
2   3      []             2

Instructions

Follow the steps carefully to get the output easily.

  1. Install pandas on your IDE(Any of your favorite IDE).
  2. Copy the snippet using the 'copy' and paste it in your IDE.
  3. Add required dependencies and import them in Python file.
  4. Add print statement at end of the code(like 'print(df)', also refer preview of the output).
  5. Run the file to generate the output.


I hope you found this useful. I have added the link to dependent libraries, version information in the following sections.


I found this code snippet by searching for 'How to do array operation of a cell in Pandas' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in PyCharm 2021.3.
  2. The solution is tested on Python 3.9.7.
  3. Pandas version-v1.5.2.


Using this solution, we are able to do array operation of a cell in pandas with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to do array operation of a cell in pandas.

Dependent Library

pandasby pandas-dev

Python doticonstar image 38689 doticonVersion:v2.0.2doticon
License: Permissive (BSD-3-Clause)

Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more

Support
    Quality
      Security
        License
          Reuse

            pandasby pandas-dev

            Python doticon star image 38689 doticonVersion:v2.0.2doticon License: Permissive (BSD-3-Clause)

            Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
            Support
              Quality
                Security
                  License
                    Reuse

                      You can also search for any dependent libraries on kandi like 'pandas'.

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