save2matlab

save2matlab (function)

Purpose

Saves the results of a simulation to a .mat file compatible with MATLAB.

Parameters

• sol: Solution object returned by an ODE solver (e.g., solve_ivp), containing time and state arrays.
• filename: Name of the output file (default: 'data'). The function saves to filename.mat.

Saved Data

The following variables are saved in the .mat file:

• t: Time array (sol.t).
• X: State variables (first N rows of sol.y, transposed).
• Xs: Desymmetrized state variables, transposed.
• Y: State variables $Y=\phi(X)$.
• Ys: Desymmetrized Y.
• Casimirs: Casimir invariants (self.casimir_coeffs).
• phi: (str) Matlab function corresponding to the function $\phi(x)$ used in the computations.
• date: Current date.
• author: Hardcoded as 'cristel.chandre@cnrs.fr'.

Features

• Uses scipy.io.savemat to write the data.
• Prints a confirmation message with the file name.

Notes

• self.desymmetrize is used to obtain symmetric-reduced data.