Re: Creating a new table using values from a column in another table,

*To*: mathgroup at smc.vnet.net*Subject*: [mg66387] Re: Creating a new table using values from a column in another table,*From*: "Scout" <Scout at nodomain.com>*Date*: Thu, 11 May 2006 02:15:32 -0400 (EDT)*References*: <e3sgqp$lsf$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

"Wonko the Sane" <noone at nowhere.com> news:e3sgqp$lsf$1 at smc.vnet.net... > Hi all, > > I have a question that I have not been able to work out myself, and so > put it to the group to help. I have a set of data points in a table (2 > columns {{x1,y1},{x2,y2},....,{xn,yn}}) I have performed a fit to the > data and have a function f[x] which I would now like to evaluate at each > data point (column 1 of the first table) to get a new table > {{x1,f[x1]},{x2,f[x2]},....,{xn,f[xn]}}. Is there a way to do this? I > hope my request is clear > > Best Regards > Michael > Hi Michael, let's assume your data points are only 4: In[1]:= t1 = {{x1, y1}, {x2, y2}, {x3, y3}, {x4, y4}}; Hence, In[2]:= t2 = Transpose[t1] Out[2]= {{x1, x2, x3, x4}, {y1, y2, y3, y4}} In[3]:= {#, f[#]} & /@ t2[[1]] Out[3]= {{x1, f[x1]}, {x2, f[x2]}, {x3, f[x3]}, {x4, f[x4]}} Best regards, ~Scout~