Re: good list
- To: mathgroup at smc.vnet.net
- Subject: [mg125116] Re: good list
- From: Bill Rowe <readnews at sbcglobal.net>
- Date: Wed, 22 Feb 2012 05:31:30 -0500 (EST)
- Delivered-to: l-mathgroup@mail-archive0.wolfram.com
On 2/21/12 at 6:15 AM, Roberto.Brambilla at rse-web.it (Brambilla
Roberto Luigi (RSE)) wrote:
>I have a function myfunc[x] (of some complexity) and I want to
>build the list of its values in the interval (a<=x<=b) with step
>dx=(b-a)/nstep
>nstep=100;
>mylist=Table[{x,myfunc[x],{x,a,b,(b-a)/nstep}];
>According to the input value, sometimes myfunc[x] is not able to
>give a numeric result
>(in my case a singular difficult numerical integral) . In others
>cases it works fine.
>My question is how to build the list with only the good cases.
Try
mylist=Cases[Table[{x,myfunc[x],{x,a,b,(b-a)/nstep}],{_,_?NumericQ}]