Re: Test function argument with VectorQ and NumericQ
- To: mathgroup at smc.vnet.net
- Subject: [mg107330] Re: [mg107305] Test function argument with VectorQ and NumericQ
- From: Leonid Shifrin <lshifr at gmail.com>
- Date: Tue, 9 Feb 2010 02:46:35 -0500 (EST)
- References: <201002081254.HAA07544@smc.vnet.net>
Hi Oliver, You need f[x:{__?NumericQ},y_?NumericQ]:=... or f[x_/;VectorQ[x,NumericQ],y_?NumericQ]:=... Regards, Leonid On Mon, Feb 8, 2010 at 4:54 AM, Oliver Fochler <janitor048 at googlemail.com>wrote: > Hi there, > > in order to get my NIntegrate running properly it seems that I need to > ensure that my functions actually take numeric arguments (without > NIntegrate trying to do some symbolic stuff before). > > For a simple case something like > > f[x_?NumericQ] := (stuff) > > seems to work fine. However, I do use vectors (lists) as function > arguments, i.e. f[x_, y_]:= (stuff) needs to be called as f[ {1,2,3}, > 4]. > How do I test this for numerical values? I know that I can use > VectorQ[ x, NumericQ ] to check whether x is a vector that contains > only numeric values. > > But how do I combine this into a pattern test, that can be used in an > argument list? > I would appreciate any help! > > Cheers, > Oliver > >
- References:
- Test function argument with VectorQ and NumericQ
- From: Oliver Fochler <janitor048@googlemail.com>
- Test function argument with VectorQ and NumericQ