Re: Summation w/ Functions
- To: mathgroup at smc.vnet.net
- Subject: [mg43403] Re: Summation w/ Functions
- From: Dr Bob <drbob at bigfoot.com>
- Date: Tue, 16 Sep 2003 04:35:55 -0400 (EDT)
- References: <200308270805.EAA11329@smc.vnet.net>
- Reply-to: drbob at bigfoot.com
- Sender: owner-wri-mathgroup at wolfram.com
If Wave is a 2-dimensional matrix, Wave[[j,0]] is the wrong notation -- the
0-th element of the j-th row will be the head List, and I don't think you
mean to integrate List over x!
Anyway, it's j that Mathematica is complaining about, before getting to
that issue.
Simplifying things a little, this works:
wave = Range[10];
Sum[ConstantCalc[someVars, j, someMoreVars]*wave[[j]], {j, 1, 10}]
But this doesn't:
wave = Range[10];
Sum[ConstantCalc[someVars, j, someMoreVars]*wave[[j]], {j, 1, n}]
That makes a certain amount of sense, since the second form is undefined if
n > 10, for instance. But then the Sum should return unevaluated. The
error messages make no sense at all.
Bobby
On Wed, 27 Aug 2003 04:05:09 -0400 (EDT), Musaddiq Awan
<reallymadsquid at hotmail.com> wrote:
> I am basically trying to sum something while calling a function of it.
> Mathematica is giving me the error that IntegerPart[j] is not an
> integer. This is the general idea of my command. (ConstantCalc is a
> function)
>
> Sum[ConstantCalc[someVars,j,someMoreVars]*Integral[Wave[[j,0]],{x,-
> Infinity,Infinity}],{j,1,n}]
>
>
--
majort at cox-internet.com
Bobby R. Treat