Re: what am i doing wrong?
- To: mathgroup at smc.vnet.net
- Subject: [mg94533] Re: what am i doing wrong?
- From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
- Date: Mon, 15 Dec 2008 07:49:27 -0500 (EST)
- Organization: The Open University, Milton Keynes, UK
- References: <gi2usp$a53$1@smc.vnet.net>
stpatryck 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]
The symbol 'npv' has already been assigned a value (a numeric value,
1304.22 in this case) so you must clear this value first.
In[6]:= ClearAll[npv]
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]
Out[8]= 371988.
Regards,
-- Jean-Marc