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. Curve fitting functions include polynomial
fits and a versatile local regression (loess)
function. Interpolations include linear, cubic spline,
bessel and monotonic 'constrained' splines, as well as
a 'flexible spline' that allows you to specify the
slope at each data point. Cubic spline function
coefficients and slope can also be returned. Data
smoothing functions include moving average, median
filter, and a Gaussian smoothing filter. Data Curve
Fit Creator Add-in also includes automatic sorting and
data repair functions.

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