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Re: what am i doing wrong?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg94492] Re: what am i doing wrong?
  • From: dimitris <dimmechan at yahoo.com>
  • Date: Mon, 15 Dec 2008 07:41:57 -0500 (EST)
  • References: <gi2usp$a53$1@smc.vnet.net>

On 14 =C4=E5=EA, 14:40, stpatryck <stpatr... at gmail.com> wrote:
> In[111]:= npv[cf0_, cf1_, cf2_, cf3_, cf4_, cf5_] := -(cf0) +
>    cf1*(1/((1.12)^1)) + cf2*(1/((1.12)^2)) + cf3*(1/((1.12)^3)) +
>    cf4*(1/((1.12)^4)) + cf5*(1/((1.12)^5));
>
> (* Plan A NPV *)
> npv[3600000, 0, 0, 0, 0, 7000000]
>
> SetDelayed::write: Tag Real in 1304.33[cf0_,cf1_,cf2_,cf3_,cf4_,cf5_]
> is Protected. >>
>
> Out[111]:= 1304.33[3600000, 0, 0, 0, 0, 7000000]

Start a new session.

In[8]:=
Quit[]

In[3]:=
npv[cf0_, cf1_, cf2_, cf3_, cf4_, cf5_] := -cf0 + cf1*(1/1.12^1) +
   cf2*(1/1.12^2) + cf3*(1/1.12^3) + cf4*(1/1.12^4) + cf5*(1/1.12^5);
npv[3600000, 0, 0, 0, 0, 7000000]

Out[4]=
371988.

Dimitris


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