Re: Data manipulation in Mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg2791] Re: Data manipulation in Mathematica*From*: ianc (Ian Collier)*Date*: Sun, 17 Dec 1995 02:07:25 -0500*Organization*: Wolfram Research, Inc.

In article <4ar621$2hq at dragonfly.wri.com>, hedden at umich.edu (Julius C Hedden) wrote: > I have a set of data files in a matrix format that is the output of a C > program. It consists of a list of 3 columns, each containing 100 items. > I have been able to read in the data into Mathematica and organize it > into sublists. What I need help on is how to do some manipulations on > that data after I have it in sublists. First, I want to eliminate one > column and pair the remaining two to set up a list of data points to > graph. Then I want to retrieve the original data, delete a different > column and pair the remaining two for a contrasting set of data points. > Then, I want to take the log of all the numbers in a single column and > pair that new info with the original data from one of the other columns. > Is there anyway for me to do this type of manipulation within Mathematica? > Any help would be appreciated greatly. > -Trey You should find that the package LinearAlgebra`MatrixManipulation`, one of the Standard Mathematica Packages that are distributed with Mathematica, will do what you want. It is documented on pages 218-221 of The Guide To Standard Mathematica Packages Technical Report. I hope this helps. --Ian ----------------------------------------------------------- Ian Collier Technical Sales Support Wolfram Research, Inc. ----------------------------------------------------------- tel:(217) 398-0700 fax:(217) 398-0747 ianc at wri.com Wolfram Research Home Page: http://www.wri.com/ -----------------------------------------------------------