R: How to Replace Values in Data Frame Conditionally - Statology Right now I am using your “3. How to Select Rows by Condition in R (With Examples) Update a Value in One Column Based on Criteria in Other Columns (4 answers) Closed last year. I am looking for a way to replace values in a single column based on the value in another column and then doing this multiple times with many pairs of columns in a single step (I have no idea if this is possible). In the below example, we match the value from col2 in col1 and replace with col3 to create new_column. Is it possible to write this in a nicer way? How to mutate_at/mutate_if multiple columns using condition on … To replace a values in a column based on a condition, using DataFrame.loc, use the following syntax. DataFrame.loc[condition, column_name] = new_value In the following program, we will replace those values in the column ‘a’ that satisfy the condition that the value is less than zero. How to filter R dataframe by multiple conditions? - GeeksforGeeks Example 1: In our data frame “Sita” marks are given as 20 let us replace it with 25. Solved: Conditional Replace Value across table (multiple r If we can access it we … Replace multiple values in multiple columns in one step - Power BI Here, the condition is specified with a formula, following the syntax: ~.x {condition}. condition: A condition required to be TRUE to set NA. Here an extract of the dataset: I would like to conditionally change the value of all the numerical variables: If the value is less then 10, I would like it replaced with NA (or ideally leave … Sometimes, the column value of a particular column has some relation with another column and we might need to change the value of that particular column based on some conditions. The content of the post is structured as follows: 1) Creation of Example Data. df1 = … conditional mutate across multiple columns - RStudio Community I'm trying to replace the value of a column based on the data in a different column, but it's not working. All you need to do now is to modify the code with the correct logic. keeps dropping out of my memory.. Sorted by: 1. You can use one of the following methods to replace values in a data frame conditionally: Method 1: Replace Values in Entire Data Frame.