The input.config is crucial in appliance of the tool, as it allows a user to define the type of analysis to be conducted. Within the file, rows starting with a hash (#) are comments providing explanation of the needed input. In the latter file one needs to specify the path where the data is stored which is used for the fit, particularly the code requires the data pairs (X, Y) in a file with 2 columns and N rows, where N is the number of data points. Additionally the errors on the two variables need to be specified, this can be done by providing files containing the components of the N × N covariance matrix for C XX , C YY and C XY respectively. Alternatively one can just specify constant absolute or relative errors. The generated output may defined within the configuration file in terms of the desired filename as well as colors or axis labels on the generated plots.