You want to show custom hover labels on a scatter plot with points labeled by their index. Which approach using mplcursors is correct?

hard📝 Application Q8 of 15

Matplotlib - Interactive Features

You want to show custom hover labels on a scatter plot with points labeled by their index. Which approach using mplcursors is correct?

ASet labels using <code>plt.annotate()</code> before calling mplcursors

BUse <code>cursor.connect('add', lambda sel: sel.annotation.set_text(f'Index: {sel.index}'))</code>

CPass a list of labels directly to <code>mplcursors.cursor()</code> as an argument

DUse <code>cursor.set_labels()</code> method with the label list

Step-by-Step Solution

Solution:

Step 1: Understand custom label setting in mplcursors
Use the 'add' event to set annotation text dynamically via a lambda function.
Step 2: Evaluate options
mplcursors.cursor() does not accept label lists directly; plt.annotate() is static; set_labels() does not exist.
Final Answer:
Use cursor.connect('add', lambda sel: sel.annotation.set_text(f'Index: {sel.index}')) -> Option B
Quick Check:
Custom labels via event connection [OK]

Quick Trick: Use cursor.connect('add', func) to customize hover labels [OK]

Common Mistakes:

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