spectroplot 0.0.2

A Python class for plotting frequency overlaps.

SpectroPlot

SpectroPlot is a Python class for loading frequency assignment data from Excel files, cleaning it, and plotting frequency overlaps by category. It’s designed for radio spectrum engineers, regulators, or analysts who want to visualize how frequency assignments stack up within different categories (e.g., services, technologies, or operators).

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Features

✅ Load frequency ranges and categories directly from Excel
✅ Exclude specified entries (e.g., rows marked with Exclude='yes')
✅ Automatically clean, validate, and prepare data
✅ Plot frequency overlap "staircase" charts per category
✅ Flexible column naming
✅ Configurable frequency bounds
✅ Handles near-identical frequencies with epsilon tolerance

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Requirements

• Python 3.7+
• pandas
• matplotlib
• openpyxl (required by pandas to read .xlsx)

Installing

# From PyPI
py -m pip install spectroplot  # on Windows
python3 -m pip install spectroplot  # on Unix/macOS

# From GitHub
py -m pip install git+https://github.com/murzabaevb/spectroplot.git  # on Windows 
python3 -m pip install git+https://github.com/murzabaevb/spectroplot.git  # on Unix/macOS

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Expected Excel Format

Your Excel sheet must contain four columns, for example:

Category	Start	Stop	Exclude
LTE	700.0	720.0
GSM	900.0	915.0	yes
5G	3500.0	3700.0

• Category: name of the assignment category (e.g., LTE, GSM)
• Start: start frequency (numeric)
• Stop: end frequency (numeric)
• Exclude: set to "yes" (case-insensitive) to exclude the row from plotting

Note: These four columns could be named differently in Excel file. If so, it is necessary to pass these headers when instantiating the object of the class as shown in the example below. Apart from these four columns, the Excel file may contain other columns that would be ignored during reading.

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Usage Example

from spectroplot import SpectroPlot

# Initialize with your Excel file, default sheet name and column headers
sp = SpectroPlot(excel_file='data.xlsx')

# Load and clean data
sp.load_data()

# Plot overlaps
sp.plot()

Default values:

• sheet_name='Sheet1,
• columns=['Category', 'Start', 'Stop', 'Exclude']

from spectroplot import SpectroPlot
# Initialize with your Excel file and custom sheet/columns
sp = SpectroPlot(
    excel_file='assignments.xlsx',
    sheet_name='uhf',
    columns=['system', 'f_low', 'f_hi', 'excl'],
)

# Load and clean data
sp.load_data()

# Plot overlaps of entire data read
sp.plot()

# Or specify frequency bounds as per your requirement
sp.plot(min_freq=600, max_freq=4000)

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Output

• Generates a matplotlib plot with one subplot per category
• Each plot shows the number of overlapping frequency assignments as a staircase
• Colors are automatically assigned from the tab20 colormap

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Parameters

SpectroPlot constructor:

• excel_file: Path to your Excel file
• sheet_name: Name of the worksheet to read (default: 'Sheet1')
• columns: List of four column names in order (default: ['Category', 'Start', 'Stop', 'Exclude'])
• epsilon: Tolerance for merging events with nearly identical frequencies (default: 1e-6)

plot() method:

• min_freq: Lower frequency bound of plotting
• max_freq: Upper frequency bound of plotting

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License

MIT License. Feel free to use, modify, and contribute!

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Project Links

• GitHub Repository
• GitHub Issues