Re: Replace non-numeric values in a list
- To: mathgroup at smc.vnet.net
- Subject: [mg88819] Re: Replace non-numeric values in a list
- From: Szabolcs Horvát <szhorvat+mathgroup at gmail.com>
- Date: Sat, 17 May 2008 05:31:57 -0400 (EDT)
- Organization: University of Bergen
- References: <200805151150.HAA23460@smc.vnet.net> <g0jkfd$162$1@smc.vnet.net>
Syd Geraghty wrote:
> Hi Adel,
>
> a really straightforward method would be (assuming your list
> explicitly contains letters and numbers only as in your example)
>
> In[1]= list = {a, 1, 2, b, 3};
>
> In[2]= isletter[a_] := If[LetterQ[ToString[a]], True, False]
>
> In[3]= newlist = Table[If[isletter[list[[i]]], 0, list[[i]]], {i,
> Length[list]}]
>
> Out[4]= {0, 1, 2, 0, 3}
>
It is not a very good idea to rely on ugly hacks like this ... For
example, this will fail for {1, 2, Pi} ...
- References:
- Replace non-numeric values in a list
- From: "Adel Elsabbagh" <aelsabbagh@gmail.com>
- Replace non-numeric values in a list