Update plot.py

[sylvanding]

fix bug in issue #7650

🛠️ PR Summary

_{Made with ❤️ by Ultralytics Actions}

🌟 Summary

Improved data plot handling for better graphing performance.

📊 Key Changes

• Data values are now explicitly converted to floats within the plotting method.

🎯 Purpose & Impact

• 🎨 Ensures that the data used for plotting graphs is in the correct numerical format, which may prevent potential errors or plotting issues.
• 📈 This change could lead to improved stability and accuracy in generated plots, enhancing the user experience when visualizing training results.

[github-actions]

👋 Hello @sylvanding, thank you for submitting a YOLOv5 🚀 PR! To allow your work to be integrated as seamlessly as possible, we advise you to:

• ✅ Verify your PR is up-to-date with upstream/master. If your PR is behind upstream/master an automatic GitHub Actions merge may be attempted by writing /rebase in a new comment, or by running the following code, replacing 'feature' with the name of your local branch:

git remote add upstream https://github.com/ultralytics/yolov5.git
git fetch upstream
# git checkout feature  # <--- replace 'feature' with local branch name
git merge upstream/master
git push -u origin -f

• ✅ Verify all Continuous Integration (CI) checks are passing.
• ✅ Reduce changes to the absolute minimum required for your bug fix or feature addition. "It is not daily increase but daily decrease, hack away the unessential. The closer to the source, the less wastage there is." -Bruce Lee

[glenn-jocher]

@sylvanding PR is merged. Thank you for your contributions to YOLOv5 🚀 and Vision AI ⭐