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| 1 | ;; Dawson function |
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| 2 | ;; Liam Healy, Sun Mar 19 2006 - 14:31 |
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| 3 | ;; Time-stamp: <2008-02-16 20:04:51EST dawson.lisp> |
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| 4 | ;; $Id$ |
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| 5 | |
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| 6 | #| |
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| 7 | ;;; FDL |
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| 8 | The Dawson integral is defined by \exp(-x^2) \int_0^x dt |
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| 9 | \exp(t^2). A table of Dawson's integral can be found in Abramowitz & |
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| 10 | Stegun, Table 7.5. The Dawson functions are declared in the header file |
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| 11 | gsl_sf_dawson.h. |
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| 12 | |# |
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| 13 | |
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| 14 | (in-package :gsl) |
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| 15 | |
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| 16 | (defmfun dawson (x) |
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| 17 | "gsl_sf_dawson_e" ((x :double) (ret sf-result)) |
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| 18 | :documentation ; FDL |
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| 19 | "Dawson's integral for x.") |
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| 20 | |
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| 21 | #| |
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| 22 | (make-tests dawson |
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| 23 | (dawson 1.0d0)) |
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| 24 | |# |
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| 25 | |
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| 26 | (LISP-UNIT:DEFINE-TEST DAWSON |
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| 27 | (LISP-UNIT::ASSERT-NUMERICAL-EQUAL |
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| 28 | (LIST 0.5380795069127684d0 1.424354102650492d-15) |
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| 29 | (MULTIPLE-VALUE-LIST (DAWSON 1.0d0)))) |
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| 30 | |
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