search for: comlumn

...of size n x 3, to sort the matrix by one of the columns? specifically what i am trying to do is i have a matrix with individual and group labels that is randomly generated, and is by default sorted by the individual labels ( column 1) and i want them to be organized into unique group labels (comlumn 2) thanks jimi jimi adams Department of Sociology The Ohio State University 300 Bricker Hall 190 N. Oval Mall Columbus, OH 43210-1353 614-688-4261 our mind has a remarkable ability to think of contents as being independent of the act of thinking -georg...

Hi to all, how could I to rotate automatically a data sheet which was imported by read.xls? x1 x2 x3 .... xn y1 1 4 7 ... xn/y1 y2 2 5 8 .... xn/y2 y3 3 6 9 ....xn/y2 yn ... ... ... Xn/Yn to y1 y2 y3 .... yn x1 1 2 3 ..... Yn/x1 x2 4 5 6 .... Yn/x2 x3 7 8 9 .... Yn/x2 xn ... ... ... ..... Yn/xn Kind regards Knut

Hello, I am having some fun dealing with dates and times. My input is a excel csv file with two columns with data in the following format: date time 25-Jun-1961 04:00:00 i.e. day - month - year hour:min:sec I would like to have a single object in R that combines these and converts them into a sensible R format (e.g.