# How to Set the y-Axis Limit in Python Matplotlib

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If you work in the field of data science you might have to draw a lot of plots using either Matplotlib or Seaborn. In this blog post, you will learn how to set a limit to the y-axis values in Matplotlib.

We will start by loading the Boston household data and process the data to visualize the median price of the house.

2. Import Libraries and plot data points
3. Set the y-axis limit

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

## Import Libraries and Plot Data Points

```house_values = data['median_house_value'].values
house_values = sorted(house_values)```

We now have extracted the `median_hoise_value` column and sorted the values in ascending order. Let us now being plotting the data

## Set the y-axis Limit

```paramValues = range(len(house_values))
plt.figure(figsize=(8.5,11))
plt.plot(paramValues,house_values)
plt.title('Median house price')
plt.ylabel('Median Price')
plt.xlabel('Range')
plt.grid(True)
plt.show()```

## Change y-axis Limit

```paramValues = range(len(house_values))
plt.figure(figsize=(8.5,11))
plt.plot(paramValues,house_values)
plt.title('Median house price')
plt.ylabel('Median Price')
plt.xlabel('Range')
plt.grid(True)
plt.ylim((None,400000))
plt.show()```

By using the `plt.ylim()` function we can change the limit of the y-axis. In the above example setting the second parameter to 400000 we have to change the maximum value of the y axis. Similarly, we can change the minimum value of the y-axis by changing the first argument in the `plt.ylim()` function

## Summary

In this blog post you have learned how to set the y-axis limit in `matpltotlib`.  I hope you found the post informative.