459 yoy label='center'

[cdeline]

Adds a label = 'center' option to degradation_year_on_year such that YoY_values are returned center-labeled instead of right-labeled. Helps with implementing #394 and #455. Default is still currently right-labeled for the time being, although after discussion it sounds like center-labeled values make the most sense.

• Code changes are covered by tests
• Code changes have been evaluated for compatibility/integration with TrendAnalysis
• New functions added to __init__.py
• API.rst is up to date, along with other sphinx docs pages
• Example notebooks are rerun and differences in results scrutinized
• Updated changelog

Open issue: for degradation_year_on_year - should it return a tuple when uncertainty_method = None? This results in breaking tests (test_bootstrap_module, test_rescale, circular_block_bootstrap, soiling_cods)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 92.15686% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.90%. Comparing base (416778c) to head (a0f4a1e).

Files with missing lines	Patch %	Lines
rdtools/degradation.py	95.65%	2 Missing ⚠️
rdtools/plotting.py	60.00%	2 Missing ⚠️

Additional details and impacted files

@@               Coverage Diff               @@
##           development     #460      +/-   ##
===============================================
- Coverage        96.26%   95.90%   -0.37%     
===============================================
  Files               12       12              
  Lines             2276     2320      +44     
===============================================
+ Hits              2191     2225      +34     
- Misses              85       95      +10     

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[cdeline]

The change at the end of system_availability_example.ipynb was done to bypass a nbval notebook check error that was ignoring the semicolon to suppress printing the plot twice. Changed to plt.show() instead.

[Copilot]

Pull Request Overview

This PR adds a label='center' option to the degradation_year_on_year function to return center-labeled YoY values instead of the default right-labeled values. This enhancement supports implementing issues #394 and #455 by providing more flexibility in how year-over-year degradation values are labeled.

Key changes include:

• Added label parameter to degradation_year_on_year function with 'right', 'left', and 'center' options
• Implemented center labeling logic with backward compatibility for older pandas versions
• Updated plotting functions to handle different labeling scenarios
• Added comprehensive test coverage for the new functionality

Reviewed Changes

Copilot reviewed 12 out of 13 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
rdtools/degradation.py	Core implementation of label parameter and center labeling logic
rdtools/test/degradation_test.py	Added test cases for center labeling functionality
rdtools/plotting.py	Updated color mapping and rolling window handling for multi-label scenarios
setup.py	Removed nbval version constraint
docs/	Updated notebook outputs and changelog documentation

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