# FAQ: Feature Engineering - Numerical Transformations - Natural Log Transformation

This community-built FAQ covers the “Natural Log Transformation” exercise from the lesson “Feature Engineering - Numerical Transformations”.

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This exercise can be found in the following Codecademy content:

## FAQs on the exercise Natural Log Transformation

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hey, there is no “cars.csv” file under local directory

2 Likes

I am having the same issue. How did you solve this?

``````import pandas as pd
import numpy as np
import matplotlib.pyplot as plt

## set you price variable
prices = cars['sellingprice']

## plot a histogram of prices
plt.hist(prices, bins = 150)
plt.show();

## log transform prices
log_prices = np.log(prices)

## plot a histogram of log_prices
plt.hist(log_prices, bins = 150)
plt.show();
``````

My second histogram is just like the first one. It doesn’t transoform for some reasons, it’s still right-skewed.

1 Like

Resetting the workspace worked for me.