Text placement with ax.text in Matplotlib - Cheat Sheet & Quick Revision

Recall & Review

beginner

What does the ax.text function do in matplotlib?

It adds text at a specific position on the plot, defined by x and y coordinates.

beginner

Which parameters are essential for placing text using ax.text?

The essential parameters are x and y for position, and s for the text string.

beginner

How can you change the color and font size of text added with ax.text?

Use the color parameter to set text color and fontsize to set the size.

intermediate

What does the ha and va parameters control in ax.text?

ha controls horizontal alignment (left, center, right), and va controls vertical alignment (top, center, bottom) of the text.

beginner

Why is ax.text useful in data visualization?

It helps add labels, notes, or explanations directly on the plot to make the data easier to understand.

Which of these is the correct way to add text at position (2, 3) with the text 'Hello' using ax.text?

A ax.text('Hello', 2, 3)

B ax.text(2, 3, 'Hello')

C ax.text('Hello')

D ax.text(3, 2, 'Hello')

The correct syntax is ax.text(x, y, s), so ax.text(2, 3, 'Hello') places 'Hello' at x=2, y=3.

How do you align text to the center horizontally using ax.text?

A ha='center'

B va='center'

C align='center'

D text_align='center'

The parameter ha='center' sets horizontal alignment to center.

Which parameter changes the font size of text in ax.text?

A textsize

B fontweight

C fontsize

D size

The fontsize parameter controls the size of the text font.

What does the 'va' parameter control in ax.text?

A Vertical alignment of the text

B Value of the text

C Visibility of the text

D Variable alignment

The va parameter controls vertical alignment (top, center, bottom) of the text.

If you want to add red text at coordinates (1, 1), which is the correct code?

A ax.text(1, 1, 'Text', textcolor='red')

B ax.text(1, 1, 'Text', fontcolor='red')

C ax.text('Text', 1, 1, color='red')

D ax.text(1, 1, 'Text', color='red')

The color parameter sets the text color, so ax.text(1, 1, 'Text', color='red') is correct.

Explain how to place and style text on a matplotlib plot using ax.text.

Think about position, what you want to say, and how it looks.

Describe why adding text annotations with ax.text can improve a data visualization.

Imagine you are telling a story with your plot.