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algebrite

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Computer Algebra System in Coffeescript

github.com/davidedc/Algebrite

davidedc/Algebrite

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### erf ===================================================================== Tags ---- scripting, JS, internal, treenode, general concept Authors ------- philippe.billet@noos.fr Parameters ---------- x General description ------------------- Error function erf(x). erf(-x)=erf(x) ### Eval_erf = -> push(cadr(p1)) Eval() yerf() yerf = -> save() yyerf() restore() yyerf = -> d = 0.0 p1 = pop() if (isdouble(p1)) d = 1.0 - erfc(p1.d) push_double(d) return if isZeroAtomOrTensor(p1) push(zero) return if (isnegativeterm(p1)) push_symbol(ERF) push(p1) negate() list(2) negate() return push_symbol(ERF) push(p1) list(2) return