I’ve added an quadratic interpolator to my website similar to the linear interpolator I wrote earlier. I find this useful when I’m doing a brute force search for some parameter and I’m unwilling or unable to do anything fancier.

# Interpolation

# Simple interpolation

CodeProject just posted my article Filling in the gaps: simple interpolation.

# Linear interpolator

I added a form to my website yesterday that does linear interpolation. If you enter (*x*_{1}, *y*_{1}) and (*x*_{2}, *y*_{2}), it will predict *x*_{3} given *y*_{3}or *vice versa* by fitting a straight line to the first two points. It’s a simple calculation, but it comes up just often enough that it would be handy to have a page to do it.