I have the following 2 data.frames: a1 <- data.frame(a = 1:5, b=letters[1:5]) a2 <- data.frame(a = 1:3, b=letters[1:3]) I want to find the row a1 has that a2 doesn’t. Is there a built in function for this type of operation? (p.s: I did write a solution for it, I am simply curious if someone already … Read more
I have a dataframe, and for each row in that dataframe I have to do some complicated lookups and append some data to a file. The dataFrame contains scientific results for selected wells from 96 well plates used in biological research so I want to do something like: for (well in dataFrame) { wellName <- … Read more
How does one add rows to a numpy array? I have an array A: A = array([[0, 1, 2], [0, 2, 0]]) I wish to add rows to this array from another array X if the first element of each row in X meets a specific condition. Numpy arrays do not have a method ‘append’ … Read more
