cutflow-compare 2.0.5

A Python package to compare cutflow histograms from ROOT files.

cutflow_compare

Overview

cutflow_compare is a Python package designed to simplify the comparison of cutflow histograms from ROOT files. It provides an intuitive command-line interface for analyzing and visualizing differences in cutflow data across multiple regions and files. Whether you're working with high-energy physics datasets or other ROOT-based analyses, cutflow_compare helps you streamline your workflow by automating comparisons and generating detailed reports.

Features

• Compare multiple ROOT files: Analyze cutflow histograms from two or more ROOT files simultaneously.
• Custom labels: Assign custom labels to files for better clarity in the output.
• Relative error and standard deviation: Automatically calculate relative errors and standard deviations across all files for each selection.
• CSV reports: Generate separate CSV files for each region, summarizing the comparison results.
• Colored terminal output: Use the --colored option to display results with contrasting colors for better readability.
• Flexible options: Keep selections separate or merge them, and optionally save results to custom filenames.

Why Use cutflow_compare?

When working with ROOT files, comparing cutflow histograms across different datasets or regions can be tedious and error-prone. cutflow_compare automates this process, ensuring consistency and accuracy while saving time. Its ability to handle multiple files and regions simultaneously makes it an essential tool for data analysts and researchers.

---

Installation

You can install the package using pip:

pip install cutflow_compare

Alternatively, you can clone the repository and install it manually:

git clone https://github.com/ibeuler/cutflow_compare.git
cd cutflow_compare
python setup.py install

---

Usage

After installation, you can use the command-line tool directly:

cutflow_compare --files histoOut-compared.root histoOut-reference.root -r region1 region2 region3 --labels Compared Reference

Or, if running from source:

python cutflow_compare.py --files histoOut-compared.root histoOut-reference.root -r region1 region2 region3 --labels Compared Reference

Arguments

• --files: List of input ROOT files to compare. Required.
• --regions: List of regions to compare within the cutflow histograms. Required.
• --labels: Custom labels for each file, used in the output CSV and terminal display. Optional.
• --separate-selections: Keep selections separate instead of merging them. Optional.
• --relative-error: Include relative error calculations in the output. Optional.
• --save: Save the results to CSV files. Optionally, specify a custom filename prefix. Optional.
• --colored: Display table with colored columns for better contrast in the terminal. Optional.

---

Output

The tool generates separate CSV files for each region when the --save option is used. Each CSV file contains:

• Columns for each file's event counts after cuts.
• Calculated relative errors and standard deviations for each selection (if multiple files are compared).

Example Output

For a region WZ and files histoOut-compared.root, histoOut-reference.root, and histoOut-third.root, the output CSV might look like this:

Selection	Compared_Event_After_Cut	Reference_Event_After_Cut	Third_Event_After_Cut	RelativeError_AllFiles
Selection 1	100 ± 5	105 ± 6	102 ± 4	0.03
Selection 2	200 ± 10	195 ± 9	198 ± 8	0.02

---

Examples

Basic Comparison

cutflow_compare --files histoOut-compared.root histoOut-reference.root -r region1 region2

This compares region1 and region2 in the two ROOT files and prints the results to the terminal.

Save Results to CSV

cutflow_compare --files histoOut-compared.root histoOut-reference.root -r region1 region2 --save

This saves the results for each region to separate CSV files, e.g., cutflow_comparison_region1.csv and cutflow_comparison_region2.csv.

Custom Filename for Saved Results

cutflow_compare --files histoOut-compared.root histoOut-reference.root -r region1 region2 --save my_results

This saves the results to my_results_region1.csv and my_results_region2.csv.

Colored Output

cutflow_compare --files histoOut-compared.root histoOut-reference.root -r region1 region2 --colored

This displays the results in the terminal with contrasting colors for each file's data.

---

Requirements

• Python 3.6+
• ROOT (must be installed separately, e.g., via conda: conda install -c conda-forge root)
• pandas (automatically installed with the package)
• uncertainties (automatically installed with the package)
• prettytable (automatically installed with the package)

---

License

This project is licensed under the MIT License. See the LICENSE file for more details.

---

Contributing

Contributions are welcome! If you have ideas for new features, bug fixes, or improvements, feel free to submit a pull request or open an issue on the GitHub repository.

---

Acknowledgments

This package leverages the ROOT framework for data analysis and visualization. Special thanks to the open-source community for providing the tools and libraries that make this project possible.