inf -> 1./0.
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95b908479e
commit
5046604b01
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@ -41,7 +41,7 @@ IN: math-contrib
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#! gamma(x) = integral 0..inf [ t^(x-1) exp(-t) ] dt
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#! gamma(n+1) = n! for n > 0
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dup Z:(-inf,0]? [
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drop inf
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drop 1./0.
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] [
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dup abs gamma-lanczos6 swap dup 0 > [ drop ] [ gamma-neg ] if
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] if ;
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@ -50,7 +50,7 @@ IN: math-contrib
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#! gammaln(x) is an alternative when gamma(x)'s range
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#! varies too widely
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dup 0 < [
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drop inf
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drop 1./0.
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] [
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dup abs gammaln-lanczos6 swap dup 0 > [ drop ] [ gamma-neg ] if
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] if ;
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@ -45,7 +45,7 @@ USING: errors kernel sequences math sequences-internals namespaces arrays ;
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: minmax ( seq -- min max )
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#! find the min and max of a seq in one pass
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inf -inf rot [ dup pick max -rot nip pick min -rot nip ] each ;
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1./0. -1./0. rot [ dup pick max -rot nip pick min -rot nip ] each ;
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: absminmax ( seq -- min max )
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#! find the absolute values of the min and max of a seq in one pass
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