function x=quadterp(y) % % Eric Jacobsen 1994 % % Performs a quadratic-fit peak location interpolation on a three-element input vector y. % Returns -0.5 < x < 0.5, which is the fraction of the sample spacing about the center % element where the peak is estimated to be. % % Modified: % % June 2002 - eaj - Integrated real() operation for consistency with other estimators. % x=real((y(1)-y(3))/((2*y(2))-y(1)-y(3))); %