Re: Lists

*To*: mathgroup at yoda.physics.unc.edu*Subject*: Re: Lists*From*: jeff at apl.washington.edu (jeff schindall)*Date*: Wed, 17 Mar 1993 08:55:53 -0500

>Richard writes: >----------------------------------- >I am having a difficult time dealing with lists. >I have a list of data : > >{{1,2},{2,3},{4,5}} > >I want to do some operations on the second column only. >Such as +1, Sin[], etc to each element in the second >column. I admit I only have a rudimentary knowledge >of Map, Apply, Transpose, and Flatten. Any help would >be appreciated. > >Also, I have data that needs several fitting equations. >One will be Exp[a x -b], another Exp[-c x+d], and the >last would be a polynomial. Then I would like to Plot >the data and fitting equations in there respective >regions at the same time. I have seen something >like this before, but I can't remember where. > >Thanks > Try a = {{1,2},{2,3},{4,5}} f[{x_,y_}]:= {x,Sin[y]} g=Thread[f[a]] -jeff