A 32-bit curve fitting and technical graphing program. Turbo Graphed also has a full set of drawing tools for preparing presentation quality graphics.

FindGraph is comprehensive graphing, curve fitting, and digitizing tool. FindGraph offers 12 generic fits, including linear regression, logistic functions, fourier approximation, neural networks, B-splines and parametric curves least squares approximations, plus a library of over 300 industry-specific 2D formulas. Built-in Wizard helps to apply different curve fits to discover the model that best describes the data. Last version includes the peak fitting features. The software enables you to smooth, interpolate, apply FFT and Wavelet filters, subtract, differentiate, integrate, and transform data and curves. The program comes with 200 built-in common graphing 2D functions support for polar, cartesian, and parametric equations. Built-in Wizard helps to digitize the data. The program supports OLE automation and can be built-in to other software applications.

Vector Eye is a great raster to vector converter that exports to SVG (Scalable Vector Graphics), Ps and Eps. It can recognize all major raster formats (BMP, JPEG, PNG, TIFF) and makes the web raw materials.

Raster images made from pixels acquired from scanner or CCD camera can be translated into scalable geometric shapes. Vector based images are the best way to display high quality graphics with the minimum amount of information.

Extracting this information from raster images is a great challenge, and algorithms will probably never replace our artistic sensitivity. However Vector Eye was designed to do better than current products, and gives surprisingly good results.

Vector Eye combines efficient colour segmenting with robust curve fitting. Algorithms were developed in close relations with Research in image processing and without forgetting artistic considerations. The curve fitting is precise and allows you to use Vector Eye to vectorize fonts and inked drawings.

Moreover, the curves are always well preserved since the fitting can smooth big curves without losing details. Unlike other tracing programs, it simplifies the result image by removing non significant details and extracts the image essence. As a result, files are much smaller and ready for the web. Compatible with Adobe, Corel, Jasc, Macromedia, Microsoft and all Svg, Eps, Ps editors.

Low cost 2D function plotting software. Use up to 8 functions with cascades.

Displays 2 simultaneous plots with cursors positions and deltas. File load, save, and print. Input point overlays for curve fitting. Trig, Ln, Log functions supported.

This unique Graphics Calculator provides 16 major functions. These include:
· Complete Scientific Calculator
· Polynomial Equation Solver
· Equation Solver
· Simultaneous Equations Solver
· Factorises & Expands Algebraic Expressions
· Complex Numbers
· Matrices
· Statistics
· Probability Distributions
· Fractions
· Conics
· Graphing
· Tables
· Vectors
· Finance
· Curve Fitting

Limitations:

· 10 days trial

Data Curve Fit Creator Add in description
Data Curve Fit Creator Add-in is an easy-to-use data analysis add-in for Microsoft Excel. Data Curve Fit Creator Add-in is an easy-to-use data analysis add-in for Microsoft Excel.

Data Curve Fit Creator Add-in allows you to add 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, and 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.

Requirements:

· Microsoft Excel version 2000 or later
· 20 MB of free disk space


Limitations:

· 30 days trial

FindGraph is comprehensive, feature-rich graph editor,
as well as a curve fitting and digitizing tool for engineers,
scientists and graduate students.
One of the major features FindGraph provides is an easy way to do curve fitting.
The program offers 10 generic fits, including Linear Regression,
Logistic Functions, Fourier approximation, Neural Networks
plus a library of over 120 industry-specific formulas.
Built-in Wizard of Approximation helps applying different curve fits
to discover the model that describes X,Y data the best.
Interpolation options include Lagrangian polynomials and Cubic splines.
The software also enables users to smooth, subtract, differentiate,
integrate, and transform data and curves.
The program comes with a straightforward interface,
200 built-in common graphing 2D functions
support for Polar, Cartesian, and Parametric equations,
various data input/export features and printing options.

Built-in Wizard of Digitization will help you to digitize the data.

Nonlinear regression analysis - CurveFitter

CurveFitter program performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you provide. This process is also called "curve fitting".

Quickly Find the Best Equations that Describe Your Data:
Curvefitter gives engineers and researchers the power to find the ideal model for even the most complex data, by putting a large number of equations at their fingertips. Curvefitters built-in library includes a wide array of linear and nonlinear models from simple linear equations to high order polynomials. Curve fitters state-of-the-art data fitting includes the following capabilities:
*A 38-digit precision math emulator for properly fitting high order polynomials and rationals.
*A robust fitting capability for nonlinear fitting that effectively copes with outliers and a wide dynamic Y data range.

Graphically Review Curve Fit Results:
Once your data have been fit, Curvefitter automatically sorts and plots the fitted equations by the statistical criteria of Standard Error. You can preview your graph and output publication-quality graphs in several different configurations. A residual graph as well as parameter output is generated for the selected fitted equation. Data, statistical and numeric summaries are also available from within the Review Curve Fit window.

With All This Power, its’ Still Easy to Use:
Curvefitter takes full advantage of the Windows user interface to simplify every aspect of operation -- from data import to output of results. Import data from many popular file formats including Excel, Lotus and ASCII. Once your data are in the editor, select a pre-defined equation and start the automatic fitting process with a single mouse click.

CurveFitter program performs statistical regression analysis to estimate the values of parameters for linear, multivariate, polynomial, exponential and nonlinear functions. The regression analysis determines the values of the parameters that cause the function to best fit the observed data that you provide. This process is also called "curve fitting".

Quickly Find the Best Equations that Describe Your Data:
Curvefitter gives engineers and researchers the power to find the ideal model for even the most complex data, by putting a large number of equations at their fingertips. Curvefitters built-in library includes a wide array of linear and nonlinear models from simple linear equations to high order polynomials. Curve fitters state-of-the-art data fitting includes the following capabilities:
*A 38-digit precision math emulator for properly fitting high order polynomials and rationals.
*A robust fitting capability for nonlinear fitting that effectively copes with outliers and a wide dynamic Y data range.

Graphically Review Curve Fit Results:
Once your data have been fit, Curvefitter automatically sorts and plots the fitted equations by the statistical criteria of Standard Error. You can preview your graph and output publication-quality graphs in several different configurations. A residual graph as well as parameter output is generated for the selected fitted equation. Data, statistical and numeric summaries are also available from within the Review Curve Fit window.