This a java implementation of Levenberg-Marquardt algorithm to train properly a neural network. Levenberg-Marquardt, implemented from the general descr iption in Numerical Recipes (NR), then tweaked slightly to mostly match the results of their code. Use for nonlinear least squares assuming Gaussian errors.-This is a java implementation of Levenberg-Marquardt algorithm to train properly a neural network. Levenberg-Marquardt, implemented from the general descr iption in Numerical Recipes (NR), then tweaked slightly to mostly match the results of their code. Use for nonlinear least squares assuming Gaussian errors.