r - Count number of rows by group using dplyr - Stack Overflow I am using the mtcars dataset I want to find the number of records for a particular combination of data Something very similar to the count(*) group by clause in SQL ddply() from plyr is working
summarize () deprecated in R. What to use instead? Returning more (or less) than 1 row per summarise() group was deprecated in dplyr 1 1 0 ℹ Please use reframe() instead ℹ When switching from summarise() to reframe(), remember that reframe() always returns an ungrouped data frame and adjust accordingly Call lifecycle::last_lifecycle_warnings() to see where this warning was generated
r - dplyr summarise_each with na. rm - Stack Overflow Is there a way to instruct dplyr to use summarise_each with na rm=TRUE? I would like to take the mean of variables with summarise_each("mean") but I don't know how to specify it to ignore missing v
r - summarizing counts of a factor with dplyr - Stack Overflow I want to group a data frame by a column (owner) and output a new data frame that has counts of each type of a factor at each observation The real data frame is fairly large, and there are 10 diff
Aggregate summarize multiple variables per group (e. g. sum, mean) By default, summarise() drops the last level of grouping, so all the examples above would still be grouped by year To drop all grouping, you can add an ungroup() call, or set groups = "drop" in the summarise() call