Compare two data.frames to find the rows in data.frame 1 that are not present in data.frame 2
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 … Read more
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How to split data into training/testing sets using sample function
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 = … Read more
How to combine multiple conditions to subset a data-frame using “OR”?
I have a data.frame in R. I want to try two different conditions on two different columns, but I want these conditions to … Read more
Capitalize the first letter of both words in a two word string
Let’s say that I have a two word string and I want to capitalize both of them. name <- c(“zip code”, “state”, “final … Read more
For each row in an R dataframe
I have a dataframe, and for each row in that dataframe I have to do some complicated lookups and append some data to … Read more
How to find common elements from multiple vectors?
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 … Read more
Order data frame rows according to vector with specific order
Is there an easier way to ensure that a data frame’s rows are ordered according to a “target” vector as the one I … Read more
Remove duplicated rows
I have read a CSV file into an R data.frame. Some of the rows have the same element in one of the columns. … Read more
session not created: This version of ChromeDriver only supports Chrome version 74 error with ChromeDriver Chrome using Selenium
I’m trying to run RSelenium using the rsDriver function, but when I run rD <- rsDriver() I get a message telling me I … Read more
How to convert a table to a data frame
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 … Read more