Ok, the title may not be the most descriptive. It\'s easier to explain with an example. I have a data.frame like this:
Let\'s say I have a data.frame x <- data.frame(a = c(\'A\',\'A\',\'A\',\'A\',\'A\', \'C\',\'C\',\'C\',\'C\', \'B\',\'B\',\'B\'),
I got a problems that bugs me for some time… hopefully anybody here can help me. I got the following data frame
My questions is how can join two or more data frames in system R? For example: I have two data frames: first:
I see a lot of questions and answers re order and sort. Is there anything that sorts vectors or data frames into groupings (like quartiles or deciles)? I have a \"manual\" solution, but there\'s likel
I\'m relatively new to R, and was wondering the most efficient way to it开发者_StackOverflow社区eratively construct a dataframe (one row at a time, the number of iterations \"n\" and the length of eac
I have a problem while using a subset of a data.frame in R. The subset gets created and displayed correctly, but when I try to plot it using qplot(), the rows which were not selected by the subset()
I have a very large dataframe with rows as observations and columns as genetic markers. I would like to create a new column that contains the sum of a select number of columns for each observation usi
I have a data.frame which has multiple columns. One of the columns is time and is thus non-decreasing. Rest of the columns contain observations recorded at the time given by the time specified in a ce
I\'ve got transactional data from a SQL query which I turn into a data frame. The first column of the df contains UNIX timestamps (format=\"%Y/%d/%m %H:%M\") which I would like to use to create a grap
加载中,请稍侯......