How to concatenate 2 dataframes?

How to concatenate 2 dataframes?

How to concatenate 2 dataframes?

This recipe helps you concatenate 2 dataframes


Recipe Objective

While operating with pandas, we might be interested to concat 2 or more dataframes as per our requirement (either at row or columns). Concat has special feature to handle multiple dataframes in one go.

So this recipe is a short example on how to concatenate 2 or more dataframes. Let's get started.

Step 1 - Import the library

import pandas as pd import seaborn as sb

Let's pause and look at these imports. Pandas is generally used for performing mathematical operation and preferably over arrays. Seaborn is just for importing dataset for now.

Step 2 - Setup the Data

df = sb.load_dataset('tips') df.to_csv('tips.csv') df_a=df.iloc[:,0:2] df_b=df.iloc[:,2:4] df_c=df.iloc[:,4:]

Here we have simply imported tips dataset from seaborn library. Now we have broken down the dataset into 3 dataframes: df_a, df_b and df_c.

Step 3 - Concating dataframes created

df_merged = pd.concat([df_a, df_b,df_c], axis=1)

Here, we are merging 3 dataframes on columns. We can do various other operation while concating.

Step 4 - Printing the results

print(df) print(df_a) print(df_b) print(df_c) print(df_merged)

Simply use print function to print all the dataframes created

Step 4 - Let's look at our dataset now

Once we run the above code snippet, we will see:

Scroll down the ipython file to visualize the final output.

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