Re: polynomial function
- To: mathgroup at smc.vnet.net
- Subject: [mg117731] Re: polynomial function
- From: Peter Pein <petsie at dordos.net>
- Date: Wed, 30 Mar 2011 04:15:34 -0500 (EST)
- References: <imshgm$5sk$1@smc.vnet.net>
Am 29.03.2011 13:58, schrieb cerr: > Hi There, > > I'm trying to make sense out of a polynomial function from excel, > it gives me following: > y = 2E-18x^6 - 2E-14x^5 + 1E-10x^4 - 2E-07x^3 + 0.0002x^2 - 0.0373x + > 70.098 > and i want to translate this into (normal math) where x is numbers > from 0 - 4069. > following doesnt' seem to be right: > 2/10^18*x^6 - 2/10^14*x^5+1/10^10*x&3+0.0002*x^2-0.0373*x+70.098 > But I don't see my mistake - can someone help me please? > Thank you! > Hi, I do not know what you expect exactly; but here is how I did it: copy/paste "y=2e-18...70.098" to a Notebook, select Edit-Find from menu or press ctrl-f (windows); enter E into the "Find" field and "*10^" into "Replace with:". Then click on "Replace all" and "Cancel". After shift-Enter (or Num-pad-Enter) your variable y should contain: 70.098 - 0.0373*x + 0.0002*x^2 - x^3/5000000 + x^4/10000000000 - x^5/50000000000000 + x^6/500000000000000000 ready for further work... Cheers, Peter