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Re: what am i doing wrong?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg94509] Re: what am i doing wrong?
  • From: Bill Rowe <readnews at sbcglobal.net>
  • Date: Mon, 15 Dec 2008 07:45:06 -0500 (EST)

On 12/14/08 at 7:41 AM, stpatryck at gmail.com (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]

I don't see anything wrong with the function definition. The
output you obtained strongly suggests you have defined npv
earlier in the notebook to be 1304.33. So, try searching for all
instances of npv in your notebook.



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