On Fri, Jul 22, 2011 at 9:46 AM, Bogaso Christofer <bogaso.christofer at gmail.com> wrote:> Dear all, assume I have a matrix with just 1 row. Now suppose I want to > fetch 1st few rows from that matrix, however resulting object becomesI'm assuming you mean the first few columns. The place to look is ?"[" where you would find the drop argument. matrix(1:5, 1)[, -1, drop = FALSE] Cheers, Josh> vector. Here is 1 such example: > > > >> matrix(1:5, 1) > > ? ? [,1] [,2] [,3] [,4] [,5] > > [1,] ? ?1 ? ?2 ? ?3 ? ?4 ? ?5 > >> > >> matrix(1:5, 1)[,-1] > > [1] 2 3 4 5 > > > > Can somebody point me how to keep resulting object as matrix with same row? > Ofcourse I again make legitimate matrix with something like as.matrix() > function. However I believe there must be some more directly way with > indexing in some better way! > > > > Thanks, > > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles https://joshuawiley.com/
See the "drop" argument (and link) in ?"[" -- Bert On Fri, Jul 22, 2011 at 9:46 AM, Bogaso Christofer <bogaso.christofer at gmail.com> wrote:> Dear all, assume I have a matrix with just 1 row. Now suppose I want to > fetch 1st few rows from that matrix, however resulting object becomes > vector. Here is 1 such example: > > > >> matrix(1:5, 1) > > ? ? [,1] [,2] [,3] [,4] [,5] > > [1,] ? ?1 ? ?2 ? ?3 ? ?4 ? ?5 > >> > >> matrix(1:5, 1)[,-1] > > [1] 2 3 4 5 > > > > Can somebody point me how to keep resulting object as matrix with same row? > Ofcourse I again make legitimate matrix with something like as.matrix() > function. However I believe there must be some more directly way with > indexing in some better way! > > > > Thanks, > > > ? ? ? ?[[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list > https://stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide http://www.R-project.org/posting-guide.html > and provide commented, minimal, self-contained, reproducible code. >-- "Men by nature long to get on to the ultimate truths, and will often be impatient with elementary studies or fight shy of them. If it were possible to reach the ultimate truths without the elementary studies usually prefixed to them, these would not be preparatory studies but superfluous diversions." -- Maimonides (1135-1204) Bert Gunter Genentech Nonclinical Biostatistics 467-7374
Dear all, assume I have a matrix with just 1 row. Now suppose I want to fetch 1st few rows from that matrix, however resulting object becomes vector. Here is 1 such example:> matrix(1:5, 1)[,1] [,2] [,3] [,4] [,5] [1,] 1 2 3 4 5>> matrix(1:5, 1)[,-1][1] 2 3 4 5 Can somebody point me how to keep resulting object as matrix with same row? Ofcourse I again make legitimate matrix with something like as.matrix() function. However I believe there must be some more directly way with indexing in some better way! Thanks, [[alternative HTML version deleted]]