look at the <@CALC> tag. It contains natural (log), as well as decimal (log10) logarithmic functions.
> -----Original Message----- > From: Atrix Wolfe [mailto:[EMAIL PROTECTED] > Sent: Tuesday, February 25, 2003 2:36 PM > To: [EMAIL PROTECTED] > Subject: Re: Witango-Talk: One for the Math Wizards > > > im not sure what the metatag equivelent of log is or if > witango can do log, > although im sure it must. > > does anyone know? > > ----- Original Message ----- > From: "Web Dude" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Tuesday, February 25, 2003 10:24 AM > Subject: Re: Witango-Talk: One for the Math Wizards > > > > Thanks! I will give it a try. > > > > What is log? > > > > > > >well, with the help of some people in a math chat room, we > came up with > > >this: > > > > > >months = -log(1+(principle*rate/monthlypayment))/log(1+rate) > > > > > >hope that helps (: > > > > > >----- Original Message ----- > > >From: "Web Dude" <[EMAIL PROTECTED]> > > >To: <[EMAIL PROTECTED]> > > >Sent: Tuesday, February 25, 2003 7:44 AM > > >Subject: Re: Witango-Talk: One for the Math Wizards > > > > > > > > >> I guess not... > > >> > > >> >I have a problem I am hoping someone with a better > head for math can > > >> >help me figure out. > > >> > > > >> >I have built a mortgage calculator that seems to be relatively > > >> >accurate and now would like to do the same with credit > card debt. > > >> >The mortgage calulator works like so... > > >> > > > >> ><@ASSIGN gPower <@CALC "(1+<@POSTARG 'rate'>/1200)^(<@POSTARG > > >'years'>*12)">> > > >> > > > >> >Monthly Payement = <@CALC "(<@POSTARG 'amount'>*<@POSTARG > > >> >'rate'>*<@VAR gpower>)/(1200*(<@VAR gpower>-1))" PRECISION="2" > > >> >FORMAT="num:3-*,\,,2,.,,,,"> > > >> > > > >> > > > >> >Total Cost Of Loan = <@CALC "(<@POSTARG 'amount'>*<@POSTARG > > >> >'rate'>*<@VAR gpower>)/(1200*(<@VAR gpower>-1))*(<@POSTARG > > >> >'years'>*12)" PRECISION="2" FORMAT="num:3-*,\,,2,.,,,,"> > > >> > > > >> >Now I found the formula for credit cards after much searching. > > >> > > > >> >principle = monthlypayment*(1 - (1+rate)^-months)/rate > > >> > > > >> >This works great when you know the principle, monthly > payment, rate > > >> >and the number of months but I am trying a new twist to this. > > >> > > > >> >Suppose you want the client to give you the amount > they owe on the > > >> >card, the rate and the amount of the payment they would like to > > >> >make. How would you come up with the number of months > it would take > > >> >to pay off the debt, the total amount of the interest > paid during > > >> >that time and the total cost of the debt? > > >> > > > >> >Any takers? > > >> > > > >> >p.s. my head hurts... > > >> >-- > > >> > >_____________________________________________________________ > ___________ > > >> >TO UNSUBSCRIBE: send a plain text/US ASCII email to > [EMAIL PROTECTED] > > >> > with unsubscribe witango-talk in the > message body > > >> > > >> > > >> -- > > >> > ______________________________________________________________ > __________ > > >> TO UNSUBSCRIBE: send a plain text/US ASCII email to > [EMAIL PROTECTED] > > >> with unsubscribe witango-talk in the > message body > > > > > > >_____________________________________________________________ > ___________ > > >TO UNSUBSCRIBE: send a plain text/US ASCII email to > [EMAIL PROTECTED] > > > with unsubscribe witango-talk in the message body > > > > > > -- > > > ______________________________________________________________ > __________ > > TO UNSUBSCRIBE: send a plain text/US ASCII email to > [EMAIL PROTECTED] > > with unsubscribe witango-talk in the message body > > ______________________________________________________________ > __________ > TO UNSUBSCRIBE: send a plain text/US ASCII email to > [EMAIL PROTECTED] > with unsubscribe witango-talk in the message body > ________________________________________________________________________ TO UNSUBSCRIBE: send a plain text/US ASCII email to [EMAIL PROTECTED] with unsubscribe witango-talk in the message body
