Re: function's local constants interdependence
- To: mathgroup at smc.vnet.net
- Subject: [mg69617] Re: function's local constants interdependence
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Sun, 17 Sep 2006 22:45:50 -0400 (EDT)
- Organization: The Open University, Milton Keynes, UK
- References: <eejaql$40m$1@smc.vnet.net>
rych wrote:
> Could someone please help me find a decent way to have local constants
> defined using one another in order?
> Simple "With[" doesn't work:
>
> Clear[a,b,x,y]
> ff[x_,y_]:=With[{a=x, b=2*a},{a,b}]
> ff[x,y]
>> {x,2 a}
>
> where I'd like it be >{x, 2 x}. I suspect it would work with "Module["
> but I especially wanted them to be constants.
>
> Do I have to nest With[ ? Or is there a prettier way?
> Thanks
> Igor
>
In[1]:=
Clear[a, b, x, y]
ff[x_, y_] := With[{a = x}, With[{b = 2*a}, {a, b}]]
ff[x, y]
Out[3]=
{x, 2*x}
Jean-Marc