Re: Multiple Constants
- To: mathgroup at smc.vnet.net
- Subject: [mg83242] Re: Multiple Constants
- From: dh <dh at metrohm.ch>
- Date: Fri, 16 Nov 2007 05:20:50 -0500 (EST)
- References: <fhh80l$946$1@smc.vnet.net>
Hi,
your syntax is incorrect. SetAttributes takes 2 arguments, where the
arguments may be lists. Thherefore, instead of
SetAttributes[a,b,c,Contstant] you must say:
SetAttributes[{a,b,c},Contstant]
hope this helps, Daniel
thehammerster at gmail.com wrote:
> Hi,
> I'm new to Mathematica and I feel like this is a stupid question but I
> can't seem to define more than one constant
>
> If I type
> SetAttributes[a,b,c,Contstant]
> I get
> SetAttributes::argrx: SetAttributes called with 4 arguments; 2
> arguments are \expected.
>
> I have three equations and three variables I want to solve for and I
> have 8 constants.
>
> x+y+z=1
> b*x+c*y+d*z=A
> f*x+g*y+h*z=Q
>
> b,c,d,A,f,g,h,Q are constants and I want a generic equations that I
> can use for many different variations of these constants.
>
> I've done the calculation by hand but fear I have made a mistake and
> would like to double check my calculation, and then use the equation
> to propagate my errors, as each constant has an associated standard
> error of the mean. Propagation of my error will give me an error on my
> model calculation, which is really important.
>
> Thanks
>