I\'m getting some really bizarre stuff while trying to merge multiple data frames. Help! I need to merge a bunch of data frames by the columns \'RID\' and \'VISCODE\'. Here is an example of what it l
I h开发者_C百科ave a dataframe with numeric entries like this one test <- data.frame(x = c(26, 21, 20), y = c(34, 29, 28))
I\'m trying to access $a using the following example: df<-data.frame(a=c(\"x\",\"x\",\"y\",\"y\"),b=c(1,2,3,4))
I have a data.frame: df<-data.frame(a=c(\"x\",\"x\",\"y\",\"y\"),b=c(1,2,3,4)) > df a b 1 x 1 2 x 2
Is it possible, in the expr expression of the with() function, to access the data argument di开发者_JS百科rectly?Here\'s what I mean conceptually:
This question already has answers here: Combine a list of data frames into one data frame by row (9 answers)
Suppose I have a list or data frame in R, and I would like to get the row ind开发者_C百科ex, how do I do that? That is, I would like to know how many rows a certain matrix consists of.I\'m interpretin
I am trying to merge two data.frames together, based on a common column name in each of them called series_id.Here is my merge statement:
This may seem as a typical plyr problem, but I have something different in mind. Here\'s the function that I want to optimize (skip the for loop).
I have a data.frame called series_to_plot.df which I created by combi开发者_如何学Pythonning a number of other data.frames together (shown below).I now want to pull out just the .mm column from each o
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