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Practical IDL Programming by Liam E. Gumley

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B Mathematical Routines

IDL includes a comprehensive built-in set of mathematical routines. The following tables list by problem category the name and a brief functional summary for each of the mathematical routines included in IDL version 5.4 (reproduced with permission from Research Systems, Inc.).

Table B.1 Complex numbers.

Name Purpose
complex Converts argument to complex type.
conj Returns the complex conjugate of the argument.
dcomplex Converts argument to double-precision complex type.
imaginary Returns the imaginary part of a complex value.

Table B.2 Correlation analysis.

Name Purpose
a_correlate Computes autocorrelation.
c_correlate Computes cross-correlation.
correlate Computes the linear Pearson correlation. ...

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