How to change frequncy of timeseries in python?
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How to change frequncy of timeseries in python?

How to change frequncy of timeseries in python?

This recipe helps you change frequncy of timeseries in python

Recipe Objective

While operating with over timeseries, we might have irregular frequency interval. It can be easily modified without hampering much and in one line of code.

So this recipe is a short example on how to change frequncy of timeseries in python. Let's get started.

Step 1 - Import the library

import pandas as pd

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

Step 2 - Setup the Data

ddf = pd.DataFrame({ 'timestamp': pd.to_datetime(['2021-01-01 00:00:00.40', '2021-01-01 00:00:00.46', '2021-01-01 00:00:00.49']), 'X': [7,10,3]}) print(df)

Here we have taken a randome example with irregular frequency interval.

Step 3 - Chaning Frequency

df = df.set_index('timestamp').asfreq('3ms', method='ffill') print(df)

Here, we have set the frequecy to 3 miliseconds and used 'fill' method to adjust other columns values.

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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