plot

This Python script generates a scatter plot using the ROOT library. The script reads input data from a file and plots the specified columns as x and y axes, with optional error bars. The resulting plot can be customized with various options, such as axis ranges, marker style, and draw options.

Dependencies

• Python 3
• ROOT library for Python

To install the ROOT library, please follow the instructions on the official ROOT website.

Usage

python3 -i plot [options] data_file

Options

• -x, --xcol: Target column number for x-axis (default: 1)
• --xerr: Target column number for error of x (optional)
• --xmin: Minimum value for x-axis (must be string expression, optional)
• --xmax: Maximum value for x-axis (must be string expression, optional)
• -y, --ycol: Target column number for y-axis (default: 2)
• --yerr: Target column number for error of y (optional)
• --ymin: Minimum value for y-axis (must be string expression, optional)
• --ymax: Maximum value for y-axis (must be string expression, optional)
• -m, --marker: Marker style that meets ROOT (default: 21)
• --dopt: Draw options that meet ROOT (e.g. 'l': draw line between points, default: 'p')
• --dlm: Data delimiter used in the data file (default: None)
• --cmt: Comment delimiter used in the data file (default: '#')

Example

Assuming the input data file data.txt contains the following data:

# x y ex  ey
  0 0 0.1 0.1
  1 2 0.1 0.1
  2 4 0.1 0.1
  3 6 0.1 0.1

You can create a scatter plot with the following command:

python3 -i plot --xcol 1 --ycol 2 --xerr 3 --yerr 4 data.txt

This will create a scatter plot with error bars, where the x-axis values are in column 1, y-axis values are in column 2, x error values are in column 3, and y error values are in column 4.

Author

yoshphys

Licence

plot is under MIT license. See the LICENSE for more info.