Understanding the Levenberg-Marquardt Nonlinear Least-Squares Algorithm and Error Singular Gradient in R's nls() Function: A Guide to Resolving Singular Gradient Errors with Logarithmic Transformation and Linear Modeling.

Using Nonlinear Least Squares for Effective Model Fitting in R: A Comprehensive Guide

Fitting Logarithmic Curves using R's nls Package: A Guide to Resolving Common Issues and Achieving Success