Data Curve Fit Creator Add-in is an easy-to-use data analysis add-in for Microsoft Excel. It adds curve fitting, interpolation, and data smoothing functions to Excel. These functions work just like standard Excel functions, so they are simple to use. Curve fitting functions include polynomial fits and a versatile local regression (loess) function. Interpolations include linear, cubic spline, Bessel and monotonic splines, as well as a 'flexible spline' that allows you to specify the slope at each data point. Data smoothing functions include moving average, median filter, and a Gaussian smoothing filter. Automatic sorting and data repair functions are also included. The software comes with full help documentation and an example workbook that demonstrates each function. Microsoft Excel Versions Supported - Excel 2013 is fully supported (both 32 bit and 64 bit versions), as are Excel 2010, Excel 2007, Excel 2003, Excel XP and Excel 2000.