I've been using Savitzky-Golay (SG) filters for quite a while, but always on 1D data, using an implementation based on the algorithm from the Numerical Recipes to calculate the kernel (mask ...

My algorithm for calculating matrix determinants isn't working as it should, so I'm turning to Ars for some maths help.So...I'm trying to find the determinant of a 4x4 matrix:View image: http ...