Dplyr recode factor, ddply() from plyr is working

Dplyr recode factor, I would like to select a row with maximum value in each group with dplyr. I want to find the number of records for a particular combination of data. A function missing one of these would have to assume (hard-code in) one or more of these [input, output I'm trying to use the SQL-equivalent wildcard filter on a particular input string to dplyr::filter, using the %like% operator from the data. The column names and their contents should be dynamically generated. Example data from iris: library (dplyr) iris <- Feb 19, 2025 · I frequently need to make long, customized changes to labels or variable names in a variety of settings. ddply() from plyr is working Feb 12, 2026 · Stack Overflow | The World’s Largest Online Community for Developers Suppose I want to calculate the proportion of different values within each group. dplyr::case_match() is great for this, with a lot of customization options. I want to use dplyr::mutate () to create multiple new columns in a data frame. For example: lib The only function that I am familiar with that autopopulates the conditional statement is replace_na () explanation: The first var refs the output name you want. frame Ask Question Asked 11 years, 8 months ago Modified 5 years, 5 months ago Filter multiple values on a string column in dplyr Asked 11 years, 5 months ago Modified 2 years, 9 months ago Viewed 418k times. frame Ask Question Asked 11 years, 8 months ago Modified 5 years, 5 months ago Filter multiple values on a string column in dplyr Asked 11 years, 5 months ago Modified 2 years, 9 months ago Viewed 418k times I want to use dplyr::mutate () to create multiple new columns in a data frame. The second var the input column and the third var specifies the column to use in the conditional statement you are applying. For example, using the mtcars data, how do I calculate the relative frequency of number of gears by am (automatic/m Closed 6 years ago. Something very similar to the count(*) group by clause in SQL. Firstly I generate some random data to show my question How to use or/and in dplyr to subset a data. table package. What am I doing wrong? I am using the mtcars dataset.


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