Combinations
Hi, On Tue, Oct 5, 2010 at 3:52 AM, Trying To learn again
<tryingtolearnagain at gmail.com> wrote:
Hi all, Reading more I have find a partial solution on a part of the proble in some part of the code it should appea something like: # NC: All the potential combinations 3^15 if NC[price(i,j)=="1" & price(i,j)=="2"]----> extract this column then save all the columns that contain this pre-requisite.
That's an empty set, so it's really easy to extract. Try something like NC[,(NC[3,]=="1")] Note the commas, which control whether you are selecting rows or columns. I recommend reading "An Introduction to R": http://cran.r-project.org/doc/manuals/R-intro.pdf Jonathan
2010/10/4 Trying To learn again <tryingtolearnagain at gmail.com>
Hi all, I?ve been ill and I have lost a lot of time without seen the pc. I want you to help if you can if you want. Only I need an initial guide. I?ve been out a lot of time and I need a hope. Is only for "joby" purposes. The problem: I want to simulate each of the posible combination in a play. Imagine they play to games (football games) and you can choose "1", "X", "2" you must choose this 15 times. So finally you will get a colum 15x1 si you have (3^15) posible colums. I want to extract all the columns were in the row 3 you can find an "2". Or in the row 3 appears a "1" and row 3 "x". And extract them and save in a txt document. Sorry I know that I only ask but actually I feel very fool. If you give an initial guide will be sufficient. Many thanks for all in advace.
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