# matplotlib Legends Simple Legend

## Example

Suppose you have multiple lines in the same plot, each of a different color, and you wish to make a legend to tell what each line represents. You can do this by passing on a label to each of the lines when you call `plot()`, e.g., the following line will be labelled "My Line 1".

``````ax.plot(x, y1, color="red", label="My Line 1")
``````

This specifies the text that will appear in the legend for that line. Now to make the actual legend visible, we can call `ax.legend()`

By default it will create a legend inside a box on the upper right hand corner of the plot. You can pass arguments to `legend()` to customize it. For instance we can position it on the lower right hand corner, with out a frame box surrounding it, and creating a title for the legend by calling the following:

``````ax.legend(loc="lower right", title="Legend Title", frameon=False)
``````

Below is an example: ``````import matplotlib.pyplot as plt

# The data
x =  [1, 2, 3]
y1 = [2,  15, 27]
y2 = [10, 40, 45]
y3 = [5,  25, 40]

# Initialize the figure and axes
fig, ax = plt.subplots(1, figsize=(8, 6))

# Set the title for the figure
fig.suptitle('Simple Legend Example ', fontsize=15)

# Draw all the lines in the same plot, assigning a label for each one to be
# shown in the legend
ax.plot(x, y1, color="red", label="My Line 1")
ax.plot(x, y2, color="green", label="My Line 2")
ax.plot(x, y3, color="blue", label="My Line 3")

# Add a legend with title, position it on the lower right (loc) with no box framing (frameon)
ax.legend(loc="lower right", title="Legend Title", frameon=False)

# Show the plot
plt.show()
`````` PDF - Download matplotlib for free