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DataFit
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Version
8.0
DataFit is a tool used to perform nonlinear regression
(curve fitting), statistical analysis and data
plotting. What sets DataFit apart from similar curve
fitting and regression programs is its ease of use.
DataFit is driven by a well-designed graphical
interface, so there are no complicated instructions to
remember and no programs to write. Data entry is
achieved through a standard spreadsheet interface,
which supports ASCII and ODBC data source import, as
well as cutting and pasting data from the clipboard.
With DataFit, you can perform linear or nonlinear
regression on data containing up to 20 independent
variables. You can choose from more than 600 pre-
defined equations, which are commonly used in
statistical, scientific and engineering applications,
or create your own equations. Solved equations are
sorted according to goodness-of-fit. DataFit also
includes forward selection, backward elimination,
stepwise selection and manual variable selection modes
to help determine which independent variables should
be included in your regression model for multivariate
datasets. Results include completely customizable 2D
and 3D plots, fitted parameters with confidence
intervals, input vs. estimated data and goodness-of-
fit information. Plots can be saved as templates,
which allows them to be applied to new plots in order
to instantly give them your own custom appearance.
Data tables, supporting interpolation and
extrapolation (projections), can be exported in ASCII,
Excel or HTML format. You can also automatically
export source code in BASIC or C to utilize any solved
equation in a program that you have written. Macro
capability allows curve fitting operations to be
performed non-graphically, either in batch mode or by
calling DataFit from an external program. With the
combination of an intuitive interface, online help and
wide range of features, it is a tool that is used
effectively by both beginners and experts.
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