search for: katarv

Hi, I have a large data set that I input as a matrix, where I have 1:x rows with names AX, then x+1: y rows named AY, etc. The idea is that I have to count how many rows exactly I have with name AX and how many I have with name AY (or find which row numbers have names AX). Is there any way in R to count a number of rows with a name matching a required pattern? Thanks in advance, Katie --

Hi, I'm trying to figure out syntax R function rm() needs to remove all objects starting with same name. For example, if I have object1, object2, object3, i want to do an operation similar to UNIX rm object* Thanks. -- View this message in context: http://r.789695.n4.nabble.com/remove-multiple-objects-starting-with-same-name-tp4418694p4418694.html Sent from the R help mailing list

Hi, I have a 4D data file from MATLAB, call it X, that I want to analyze in R. The first 3 dimensions are x y z coordinates and the forth is a value in time. If you took a sample vector in matlab it would look like vec1 = X(x1, y1, z1, :) vec2 = X( x2, y2, z2, :) this would give you all values (I have 300 of them) corresponding to this (x1,y1,z1) point of X. Now I read the MATLAB datafile 4D

..."technical hardware items".... I?m sure my programmation can be simplied but anyway I hope someone can give me his/her opinion. Many Thaks in advance. [[alternative HTML version deleted]] ------------------------------ Message: 70 Date: Wed, 29 Jun 2011 13:56:08 -0700 (PDT) From: katarv <katiasmirn at gmail.com> To: r-help at r-project.org Subject: Re: [R] 4D data acsess Message-ID: <1309380968421-3634004.post at n4.nabble.com> Content-Type: text/plain; charset=us-ascii Hi Sarah, I use readMat function, from R.matlab function. str(X) tells that X : num [1:64, 1:6...