Hello, I'm a student of HUST in China, named Barco You. I think we should have a general integral (or accumulative for discrete problem) transformation library, just as we have Matrix with relevant algorithms which could be dedicated to applications. My idea is that we should construct a general transformation model continuous and discrete, and the model can be instantiated for varieties of transform kernel. The transform kernel can be for: Fourier Transform (continuous and discrete) Windowed Fourier Transform Laplace Transform Wavelet Transform Gaussian Transform Z Transform .... For doing the transforms we surely need some special functions, so a special function library should also be included. Feedback, suggestion and critique are appreciated. ------------------------------- Enjoy life! Barco You