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