Figure 2
From: Identification of neutral biochemical network models from time series data
Quantification of sloppiness for one of the equations of the Lactococcus model. The figure shows the 3-D projection of the ellipsoid that represents the region of the parameter space that produces similar dynamical behaviors. The arrows show the direction of the sloppy and stiff directions in the 3-D projection, corresponding respectively to eigenvectors with small and large eigenvalues of the Hessian matrix of the cost function.