WebAug 26, 2016 · to create the 'c' column in the original dataset As the OP wants a similar option in R using if/else df$c <- apply (df, 1, FUN = function (x) if (x [1]==x [2]) x [1]+x [2] else x [2]-x [1]) Share Follow edited Aug 26, 2016 at 11:53 answered Aug 26, 2016 at 11:34 akrun 864k 37 523 647 Thank you! WebApr 4, 2024 · Introduction In data analysis and data science, it’s common to work with large datasets that require some form of manipulation to be useful. In this small article, we’ll explore how to create and modify columns in a dataframe using modern R tools from the tidyverse package. We can do that on several ways, so we are going from basic to …
R: How to Add Column to Data Frame Based on Other …
WebApr 30, 2024 · The transform () method in R is used to modify the data and perform mutations. It transforms the first argument that is supplied to the function. New columns can also be added as a second argument of the function, where it may be either a list declared at the beginning or initialized during run times using the desired regular expression evaluation. WebJul 1, 2015 · R Language Collective 1 This question already has answers here: Nested ifelse statement (10 answers) Closed 7 years ago. I want to create a new column D of data where: if column A is less than 5, then column D = column A if column A is = 5, then column D = 0 if column A is = 6, then column D = column B What would be the … date of thanksgiving 2020
How to Modify Variables the Right Way in R R-bloggers
WebI am writing a C++ program for Linux. I use many low-level libraries such as XLib, FontConfig, Xft etc. They are all written in pure C, and in some places in my code I have this annoying problem: I wrap C structures in RAII-friendly classes, where resources are allocated in constructors and freed in WebJul 29, 2024 · You can use the following basic syntax to add a column to a data frame in R based on the values in other columns: #add new column 'col3' with values based on … WebMar 11, 2024 · Note that the operator is used as an “or” statement in R. Example 2: If Statement with Multiple Conditions Using AND. The following code shows how to create a new column called rating that assigns a value of “good” if the points column is greater than 15 and the assists column is greater than 8. Otherwise it assigns a value of “bad”: bizhub 652 toner