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49 lines
2.0 KiB
Plaintext
49 lines
2.0 KiB
Plaintext
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FUDGIT is a double-precision multi-purpose fitting program.
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It can manipulate complete columns of numbers in the form
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of vector arithmetic. FUDGIT is also an expression language
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interpreter understanding most of C grammar except pointers.
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Morever, FUDGIT is a front end for any plotting program supporting
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commands from stdin. It is a nice mathematical complement to
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GNUPLOT, for example.
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The main features of FUDGIT are:
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- Command shell including history;
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- Possible abbreviation of all the ``fitting mode'' commands;
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- Possible plural when it makes sense too;
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- Interactive shell supporting flow control (while,
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if-else-endif, foreach);
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- User definable macros;
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- User definable aliases;
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- On-line help;
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- On-line loadable procedure- or function-objects;
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- On-line selectable plotting program;
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- Fourier transforms;
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- Spline interpolation;
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- Smoothing;
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- Double-precision built-in calculator;
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- Built-in interpreter supporting most of C language including
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flow control (if, else, while, for, break, continue);
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- User definable functions and procedures;
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- Double-precision vector arithmetic;
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- Access to the complete C math library;
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- Access to any external C or FORTRAN routines/libraries
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through dynamic loading;
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- Built-in fitting series such as:
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+ power series (polynomial);
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+ sine series;
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+ cosine series;
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+ Legendre polynomials;
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+ series of Gaussians;
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+ series of exponentials;
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+ series of lorentzian;
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- User definable fitting functions;
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- Totally dynamical allocation of variables and parameters;
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- Possible selection of fitting ranges;
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FUDGIT has a collection of fitting routines including:
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- straight line (linear) least squares;
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- straight line (linear) least absolute deviation;
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- general linear least squares using QR decomposition;
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- general linear least squares using singular value decomposition;
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- nonlinear Marquardt-Levenberg method;
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