Re: a simple product, but with "i = 1...n AND i != x"
- To: mathgroup at smc.vnet.net
- Subject: [mg70258] Re: a simple product, but with "i = 1...n AND i != x"
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Tue, 10 Oct 2006 06:12:10 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <egcok5$je2$1@smc.vnet.net>
xarnaudx at gmail.com wrote:
> hi,
> i would like to make a function like
> f[x_] := Product[x - i, {i, 1, n} AND i != x}
>
> obviously, the end of the expression is syntactically incorrect. But
> how to rewrite this product correctly?
> thanks
>
You could try something along the line
f[x_] := Product[If[i != x, x - i, 1], {i, 1, n}]
Regards,
Jean-Marc