From 19b1f73aa7eec9f0d8834889661b2e98ebc64041 Mon Sep 17 00:00:00 2001
From: Stefan Israelsson Tampe <stefan.itampe@gmail.com>
Date: Mon, 9 Apr 2018 14:50:28 +0200
Subject: complex math

---
 modules/language/python/module/cmath.scm | 63 ++++++++++++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 modules/language/python/module/cmath.scm

(limited to 'modules/language/python/module/cmath.scm')

diff --git a/modules/language/python/module/cmath.scm b/modules/language/python/module/cmath.scm
new file mode 100644
index 0000000..b02be2d
--- /dev/null
+++ b/modules/language/python/module/cmath.scm
@@ -0,0 +1,63 @@
+(define-module (language python module cmath)
+  #:export (polar rect exp log log10 sqrt pi e tau inf nan infj nanj isclose
+		  isnan isinf isfinite sin cos tan asin acos atan
+		  sinh cosh tanh asinh acosh atanh))
+
+(define (polar x)
+  (list (magnitude x) (angle x)))
+
+(define (rect r phi)
+  (make-polar r phi))
+
+;; pow log
+
+(define exp   (@ (guile) exp))
+(define log   (@ (guile) log))
+(define log10 (@ (guile) log10))
+(define sqrt  (@ (guile) sqrt))
+
+;; trig
+(define sin   (@ (guile) sin))
+(define cos   (@ (guile) cos))
+(define tan   (@ (guile) tan))
+(define asin  (@ (guile) asin))
+(define acos  (@ (guile) acos))
+(define atan  (@ (guile) atan))
+
+;; hyp
+(define sinh   (@ (guile) sinh))
+(define cosh   (@ (guile) cosh))
+(define tanh   (@ (guile) tanh))
+(define asinh  (@ (guile) asinh))
+(define acosh  (@ (guile) acosh))
+(define atanh  (@ (guile) atanh))
+
+;; classification
+(define isfinite1 (@ (language python module math) isfinite))
+
+(define (isfinite x)
+  (and (isfinite1 (real-part x))
+       (isfinite1 (imag-part x))))
+
+(define (isinf x)
+  (or (inf? (real-part x))
+      (inf? (imag-part x))))
+
+(define (isnan x)
+  (or (nan? (real-part x))
+      (nan? (imag-part x))))
+
+(define* (isclose a b #:key (rel_tol 1e-9) (abs_tol 0.0))
+  (define e-abs (magnitude (- a b)))
+  (if (< e-abs (max (* rel_tol (max (magnitude a) (magnitude b))) abs_tol))
+      #t
+      #f))
+ 
+(define pi  (@ (language python module math) pi))
+(define e   (@ (language python module math) e))
+(define tau (@ (language python module math) tau))
+(define inf (@ (language python module math) inf))
+(define nan (@ (language python module math) nan))
+(define infj (make-rectangular 0 inf))
+(define nanj (make-rectangular 0 nan))
+
-- 
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