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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