# Line charts

**Python Courses**

**Line chart**

You can use Matplotlib to create a line chart with Python. Matplotlib is a plotting library for the Python programming language and its numerical mathematics extension numpy. This takes only a few lines:

import numpy as np |

In the first two lines we include the numpy and matplotlib library. This contains logical functions to create line charts amongst others. We define a list named x with a few random numbers and we set the x and y label. Finally we call the function show() which will display the line chart. If you do not call the show() function, nothing will be shown on the screen.

by changing the plot function call to:

plt.plot(x, 'ro-') |

we create a red graph with dots, where the r in ‘ro-‘ indicates red. Changing this to ‘bo-‘ would create a blue dotted line. If you only want to display the dots, use ‘ro’ or ‘bo’ instead.