Update README.md

README.md

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 # wind-rose
 
 Python library to plot wind roses.
+
+## Installation
+
+You can install directly from this repository:
+
+```
+pip install git+https://github.com/marcia-marques/wind-rose.git
+```
+
+## Example of use
+
+```python
+import windroses.windroses as wr
+import matplotlib.pyplot as plt
+import seaborn as sns
+import pandas as pd
+
+df = pd.read_csv('data.txt')
+
+plt.figure(figsize=(9,9))
+sns.set_style('darkgrid')
+wr.wind_rose(df, 'wd', yaxis=67.5)
+```
+![image](https://user-images.githubusercontent.com/75334161/128109752-82a96fd0-0380-42c8-8542-c301ba34e4a5.png)