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Re: Simple question from a biologist
*To*: mathgroup at smc.vnet.net
*Subject*: [mg67172] Re: Simple question from a biologist
*From*: Bill Rowe <readnewsciv at earthlink.net>
*Date*: Sun, 11 Jun 2006 02:18:02 -0400 (EDT)
*Sender*: owner-wri-mathgroup at wolfram.com
On 6/10/06 at 4:53 AM, terry_najdi at hotmail.com (tnad) wrote:
>I solved this eqation:
>Sol = Solve[{{{-x, 0, z}, {x, -y, 0}, {0, y, -z}}.{A, B, C} == 0, A
>+ B + C == 1}, {A, B, C}]
>and got the ouputs of A, B and C interms of x,y, and z each.
>Now I want to express a term called "rate" where rate = Ax = By = Cz
>in terms of x, y and Z only.
>So I tried to do this: Solve[rate == Ax , rate] /. Sol
>but I cannot get the rate in terms of x,y and z. Is there a better
>way to do this?
I think the problem is you have created a new variable Ax when you meant the product of A and x. That is;
In[26]:=
Solve[rate == A x,rate]/.Sol
Out[26]=
{{{rate -> (x*y*z)/(x*y + z*y + x*z)}}}
seems to be what you want
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