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Curve Fitting and Function
Minimization - Robust non-linear least squares curve fitting
(MPFIT), statistical tests, specialized peak fitting functions, and
non-linear optimization (TNMIN) |
Read and Write SAVE
Files - Library to read, write and interrogate IDL SAVE files
(CMSVLIB); read and translate compiled IDL procedures; documentation
of IDL SAVE file format.
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Graphics Programs -
Display an image using a PLOT-like interface;
display colorful bar charts;
plot three dimensional data as a cube;
plot fixed- or variable-width histograms
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Mathematics -
Adaptive numerical integration (Quadpack);
Chebyshev approximation and interpolation;
(Modified) Cholesky factorization of a symmetric matrix;
QR matrix decomposition;
Manipulate quaternions
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Printing Utilities -
One-click printing (Unix);
configure Postscript layout;
enhanced XWINDOW
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Introspection -
Generate a type description or "help" description of an IDL value;
compute type information for tags in a structure;
unofficial documentation for ROUTINE_NAMES
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Ephemeris & Timing -
Interpolate the positions and motions of planets (JPL ephemerides);
read and interpolate geopotentials;
calculate relativistic clock corrections in the solar system;
compute relativistic velocity additions;
compute high precision earth orientation angles;
compute leap seconds.
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Array / Set Operations -
Hash tables;
Manipulate 1-D Intervals (GTIs);
compute the fast product of a large array;
efficiently insert / delete elements in an array;
perform set operations on numbers and strings;
generic replacement for IDL's REPLICATE;
apply generic function to array
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Input / Output -
Capture a transcript of console output;
read ASCII tables quickly;
construct path names;
read and seek on pipes/URLs like normal files (Unix)
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Miscellaneous -
Command line debugging made easy;
compute and convert between time representations;
maintain a one-line status line (Unix/ANSI);
improved image interpolation
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