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’ve just started using R and I’m not sure how to incorporate my dataset with the following sample code: sample(x, size, replace = FALSE, prob = NULL) I have a dataset that I need to put into a training (75%) and testing (25%) set. I’m not sure what information I’m supposed to put into the … Read more
I have a data.frame in R. I want to try two different conditions on two different columns, but I want these conditions to be inclusive. Therefore, I would like to use “OR” to combine the conditions. I have used the following syntax before with lot of success when I wanted to use the “AND” condition. … Read more
Let’s say that I have a two word string and I want to capitalize both of them. name <- c(“zip code”, “state”, “final count”) The Hmisc package has a function capitalize which capitalized the first word, but I’m not sure how to get the second word capitalized. The help page for capitalize doesn’t suggest that … 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
Can anyone tell me how to find the common elements from multiple vectors? a <- c(1,3,5,7,9) b <- c(3,6,8,9,10) c <- c(2,3,4,5,7,9) I want to get the common elements from the above vectors (ex: 3 and 9) 3 Answers 3
Is there an easier way to ensure that a data frame’s rows are ordered according to a “target” vector as the one I implemented in the short example below? df <- data.frame(name = letters[1:4], value = c(rep(TRUE, 2), rep(FALSE, 2))) df # name value # 1 a TRUE # 2 b TRUE # 3 c … Read more
I have read a CSV file into an R data.frame. Some of the rows have the same element in one of the columns. I would like to remove rows that are duplicates in that column. For example: platform_external_dbus 202 16 google 1 platform_external_dbus 202 16 space-ghost.verbum 1 platform_external_dbus 202 16 localhost 1 platform_external_dbus 202 16 … Read more
I’m trying to run RSelenium using the rsDriver function, but when I run rD <- rsDriver() I get a message telling me I need a newer version of Chrome: > rD <- rsDriver() checking Selenium Server versions: BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD BEGIN: POSTDOWNLOAD checking chromedriver versions: BEGIN: PREDOWNLOAD BEGIN: DOWNLOAD BEGIN: POSTDOWNLOAD checking geckodriver versions: … Read more
I have a table in R that has str() of this: table [1:3, 1:4] 0.166 0.319 0.457 0.261 0.248 … – attr(*, “dimnames”)=List of 2 ..$ x: chr [1:3] “Metro >=1 million” “Metro <1 million” “Non-Metro Counties” ..$ y: chr [1:4] “q1” “q2” “q3” “q4” And looks like this when I print it: y x … Read more
