


Annotating Pandas Bar Plots with Rounded Values
To annotate bar plots with rounded numerical values, consider the following steps:
Understanding the Issue
The goal is to add annotations to each bar in a Pandas bar plot, displaying the rounded numerical values from the DataFrame. However, a common pitfall is that annotations may be centered on the x ticks instead of being centered above each bar.
Solution
To rectify this issue, utilize the axes' patches. For each patch, retrieve its height and width and use it to calculate the annotation placement. The following code demonstrates how to implement this:
for p in ax.patches: height = p.get_height() width = p.get_width() ax.annotate(str(np.round(height, decimals=2)), (p.get_x() + width * 0.5, height * 1.005))
Customization
The exact placement and formatting of annotations can be fine-tuned by adjusting the offsets and string formatting. Additionally, for stacked bar plots, consider tracking the offsets to ensure proper annotation alignment.
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