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pandas dataframe add column from another column

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Plif Plouf answered on May 29, 2020 Popularity 10/10 Helpfulness 5/10

answer pandas dataframe add column from another column

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pandas dataframe add column from another column

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import pandas as pd

df = pd.DataFrame({'a':[1,2], 'b':[3,4]})
df['c'] = df.apply(lambda row: row.a + row.b, axis=1)
df
#    a  b  c
# 0  1  3  4
# 1  2  4  6

Popularity 10/10 Helpfulness 5/10 Language python

Source: stackoverflow.com

Tags: add dataframe pandas python

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Contributed on May 24 2022

Plif Plouf

0 Answers Avg Quality 2/10

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how to add column to the Dataframe in python

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#using the insert function:
df.insert(location, column_name, list_of_values) 
#example
df.insert(0, 'new_column', ['a','b','c'])
#explanation:
#put "new_column" as first column of the dataframe
#and puts 'a','b' and 'c' as values

#using array access:
df['new_column_name'] = value

Popularity 10/10 Helpfulness 4/10 Language python

Source: Grepper

Tags: add

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Contributed on May 22 2022

DON-PECH

0 Answers Avg Quality 2/10

add column to df from another df

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# pre 0.24
feature_file_df['RESULT'] = RESULT_df['RESULT'].values
# >= 0.24
feature_file_df['RESULT'] = RESULT_df['RESULT'].to_numpy()

Popularity 10/10 Helpfulness 4/10 Language python

Source: stackoverflow.com

Tags: add

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Contributed on May 29 2020

Bad Barracuda

0 Answers Avg Quality 2/10

add column to df from another df

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# pre 0.24
feature_file_df['RESULT'] = RESULT_df['RESULT'].values
# >= 0.24
feature_file_df['RESULT'] = RESULT_df['RESULT'].to_numpy()

Popularity 9/10 Helpfulness 2/10 Language python

Source: devarama.com

Tags: add

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Contributed on Mar 25 2022

Modern Mongoose

0 Answers Avg Quality 2/10

Adding a new column in pandas dataframe from another dataframe with different index

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merge(left, right, how='left', on=None, left_on=None, right_on=None,
      left_index=False, right_index=False, sort=True,
      suffixes=('_x', '_y'), copy=True)

Popularity 10/10 Helpfulness 2/10 Language python

Source: pandas.pydata.org

Tags: dataframe data

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Contributed on Jan 13 2021

Horrible Hippopotamus

0 Answers Avg Quality 2/10

Adding new column to existing DataFrame in Pandas

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# import pandas library
import pandas as pd

# create pandas DataFrame
df = pd.DataFrame({'team': ['India', 'South Africa', 'New Zealand', 'England'],
                   'points': [10, 8, 3, 5],
                   'runrate': [0.5, 1.4, 2, -0.6],
                   'wins': [5, 4, 2, 2]})

# print the DataFrame
print(df)


# insert the new column at the specific position
df.insert(3, "lost", [2, 1, 3, 4], True)

# Print the new DataFrame
print(df)

Popularity 10/10 Helpfulness 2/10 Language python

Source: itsmycode.com

Tags: dataframe data

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Contributed on Jan 24 2022

Gorgeous Gazelle

0 Answers Avg Quality 2/10

Adding new column to existing DataFrame in Pandas

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# Import pandas package
import pandas as pd
  
# Define a dictionary containing Students data
data = {'Name': ['Jai', 'Princi', 'Gaurav', 'Anuj'],
        'Height': [5.1, 6.2, 5.1, 5.2],
        'Qualification': ['Msc', 'MA', 'Msc', 'Msc']}
  
# Convert the dictionary into DataFrame
df = pd.DataFrame(data)
  
# Declare a list that is to be converted into a column
address = ['Delhi', 'Bangalore', 'Chennai', 'Patna']
  
# Using 'Address' as the column name
# and equating it to the list
df['Address'] = address
  
# Observe the result
print(df)

Popularity 10/10 Helpfulness 2/10 Language python

Source: Grepper

Tags: dataframe data

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Contributed on Jul 14 2022

Travinth Dayalaeaswaran

0 Answers Avg Quality 2/10

Add new column of dataframe

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Other['Extracurr'] = count

Popularity 10/10 Helpfulness 1/10 Language python

Source: Grepper

Tags: add

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Contributed on Jun 20 2022

Chunxiao Wang

0 Answers Avg Quality 2/10

pandas dataframe add column from another column

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pandas dataframe add column from another column

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add column to df from another df

add column to df from another df

Adding a new column in pandas dataframe from another dataframe with different index

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Adding new column to existing DataFrame in Pandas

Add new column of dataframe

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