I want to find the (NumericFunction) built-in functions that take exactly one document.

Select[Names["*"], MemberQ[Attributes[#], NumericFunction] &]

returns a list of numeric functions but among them there are both functions like Sinand QHypergeometricPFQ.

How can I be more specific? Thanks.

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    $\begingroup$ You can try to use it: Select[Select[Names["*"], MemberQ[Attributes[#], NumericFunction] &], MatchQ[SyntaxInformation[Symbol[#]], {_ -> {_}}] &] $\endgroup$ – Kirill Belov Mar 2 '17 at 11:02
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    $\begingroup$ @KirillBelov I have to say the SyntaxInformation don't very fit such case.How about those function with two argument? $\endgroup$ – yode Mar 2 '17 at 11:09
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    $\begingroup$ @Dimitris wanted to get built-in functions with one argument. In other cases you can apply another pattern MatchQ[SyntaxInformation[func], pattern] $\endgroup$ – Kirill Belov Mar 2 '17 at 11:18
  • $\begingroup$ @KirillBelov Look here $\endgroup$ – yode Mar 2 '17 at 13:11

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