Re: Simple task with Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg63047] Re: [mg63040] Simple task with Mathematica*From*: Murray Eisenberg <murray at math.umass.edu>*Date*: Sun, 11 Dec 2005 22:25:21 -0500 (EST)*Organization*: Mathematics & Statistics, Univ. of Mass./Amherst*References*: <200512110957.EAA23416@smc.vnet.net>*Reply-to*: murray at math.umass.edu*Sender*: owner-wri-mathgroup at wolfram.com

Would you kindly state this more clearly: I don't see a "first column" in your example, nor a second. Lea Rebanks wrote: > Dear Sir / Madame, > > I am currently learning how to use Mathematica at college with a view to > purchasing the program. > > Having spent a week studying the documentation / Book etc of version 4 I > am struggling to do even the most simple tasks. I have looked at other > Math programs, but I am really impressed with the numerical precision & > scope of Mathematica. Below is an example of a really easy task which I > can do in a second in Excel, however I am stuck with Mathematica 4. > Please show me the correct code to do in Mathematica. Many thanks for > your attention. > > Question:- > > Given the two columns below; I am trying to take the first column (A) > created as a list & iterate it by starting with 5 to finish with the > second column using the function A(1) = (6.5*2)-5 (starting value from > the second column) = 8. > > Then, for A(2) = (9.5*2)-8 =11 etc, etc giving the second column. > Function A(x) = x*2. > > (A)rea > > 5 > > > 6.5 > > 8 > > > 9.5 > > 11 > > > 8.5 > > 6 > > > 4.5 > > 3 > > > 9 > > 15 > > > 12.5 > > 10 > > > 12.5 > > 15 > > > 17.5 > > 20 > > > 18.5 > > 17 > > > 11 > > 5 > > > > I have tried indexing with x = Range[11] & using A[[x]]-B[[x-1]]. Sorry, > but I am really confused. > > > > Many thanks for any help you can offer. > > > > Best regards, > > > > Lea Rebanks. > > -- Murray Eisenberg murray at math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 549-1020 (H) University of Massachusetts 413 545-2859 (W) 710 North Pleasant Street fax 413 545-1801 Amherst, MA 01003-9305

**References**:**Simple task with Mathematica***From:*"Lea Rebanks" <lrebanks@onetelhk.net>