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Re: Problem with Which


I cannot duplicate the problem on my system; however, I recommend that you use Module to isolate tipo to be a local variable. A module would also enable you to use a shorthand notation for NumericQ

AH[Ts_,Th_,Tr_,f_,w_,i_]:=
    Module[{tipo,n=NumericQ},
      Which[
        n[Ts]&&n[Th],tipo=1,
        n[Ts]&&n[Tr],tipo=2,
        n[Ts]&&n[f],tipo=3,
        n[Ts]&&n[w],tipo=4,
        n[Ts]&&n[i],tipo=5,
        n[Th]&&n[Tr],tipo=6,
        n[Th]&&n[f],tipo=7,
        n[Th]&&n[w],tipo=8,
        n[Th]&&n[i],tipo=9,
        n[Tr]&&n[f],tipo=10,
        n[Tr]&&n[w],tipo=11,
        n[Tr]&&n[i],tipo=12,
        n[f]&&n[w],tipo=13,
        n[f]&&n[i],tipo=14,
        n[w]&&n[i],tipo=15];
      tipo];

AH[1,Th,Tr,f,4,i]

4

AH[1,Th,Tr,f,w,5]

5

AH[Ts,Th,Tr,4,4,i]

13

AH[Ts,Th,Tr,4,w,5]

14


Bob Hanlon

---- Miguel <mibelair at hotmail.com> wrote: 
> Let a function of six variable
> AH[Ts_,Th_,Tr_,f_,w_,i_]:=(
>     Which[NumericQ[Ts]&&NumericQ[Th],tipo=1,
>       NumericQ[Ts]&&NumericQ[Tr],tipo=2,
>       NumericQ[Ts]&&NumericQ[f],tipo=3,
>       NumericQ[Ts]&&NumericQ[w],tipo=4,
>       NumericQ[Ts]&&NumericQ[i],tipo=5,
>       NumericQ[Th]&&NumericQ[Tr],tipo=6,
>       NumericQ[Th]&&NumericQ[f],tipo=7,
>       NumericQ[Th]&&NumericQ[w],tipo=8,
>       NumericQ[Th]&&NumericQ[i],tipo=9,
>       NumericQ[Tr]&&NumericQ[f],tipo=10,
>       NumericQ[Tr]&&NumericQ[w],tipo=11,
>       NumericQ[Tr]&&NumericQ[i],tipo=12,
>       NumericQ[f]&&NumericQ[w],tipo=13,
>       NumericQ[f]&&NumericQ[i],tipo=14,
>       NumericQ[w]&&NumericQ[i],tipo=15];
> tipo)
> 
> In[77]:=AH[1,Th,Tr,f,4,i]
> Out[77]=
> 4
> Correct
> 
> In[78]:=AH[1,Th,Tr,f,w,5]
> Out[78]=
> 4
> Wrong
> 
> In[79]:=AH[Ts,Th,Tr,4,4,i]
> Out[79]=
> 13
> Correct
> 
> In[80]:=AH[Ts,Th,Tr,4,w,5]
> Out[80]=
> 13
> Wrong
> 
> I d'ont understand. Where is my error?



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