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r - How to sum data.frame column values? - Stack Overflow
...I have a data frame with several columns; some numeric and some character. How to compute the sum of a specific column? I?ve googled for this and I see numerous functions (sum, cumsum, rowsum, rowS......
https://stackoverflow.com/questions/9676212/how-to-sum-data-frame-column-values
Add row to a data frame with total sum for each column
...A tidyverse way to do this would be to use bind_rows (or eventually add_row) and summarise to compute the sums. Here the issue is that we want sums for all but one, so a trick would be:...
https://stackoverflow.com/questions/4946873/add-row-to-a-data-frame-with-total-sum-for-each-column
What is the difference between summarizes and summarises?
...Summarise is more common in British English, where summarize can also be found frequently. Summarize is more common in American English, where summarise is rarely used....
https://english.stackexchange.com/questions/34037/what-is-the-difference-between-summarizes-and-summarises
What is the correct punctuation after "as follows"?
...Semicolons to separate the chapters, as proposed in another answer, is certainly a valid approach. However, I'd like to answer from a different angle - one that comes from my experience with lists in technical writing, where they are very common. First of all, the right punctuation after "as follows" is a colon. There's no way around that. "Follows" or "following" is the indicator. You could ......
https://english.stackexchange.com/questions/394859/what-is-the-correct-punctuation-after-as-follows
r - How to get summary statistics by group - Stack Overflow
...I'm trying to get multiple summary statistics in R/S-PLUS grouped by categorical column in one shot. I found couple of functions, but all of them do one statistic per call, like aggregate(). data &......
https://stackoverflow.com/questions/9847054/how-to-get-summary-statistics-by-group
r - Relative frequencies / proportions with dplyr - Stack Overflow
...For the sake of completeness of this popular question, since version 1.0.0 of dplyr, parameter .groups controls the grouping structure of the summarise function after group_by summarise help. With .groups = "drop_last", summarise drops the last level of grouping. This was the only result obtained before version 1.0.0....
https://stackoverflow.com/questions/24576515/relative-frequencies-proportions-with-dplyr
r - Concatenate strings by group with dplyr - Stack Overflow
...The use of summarise really sped up my similar operation. I wasn't doing any grouping, just concatenating the full column, so didn't think of it. Good call. Cut my paste0 down from 5+ minutes to ~3 secs....
https://stackoverflow.com/questions/38514988/concatenate-strings-by-group-with-dplyr
SUM of grouped COUNT in SQL Query - Stack Overflow
...Beware in the answers below--There is no guaranteed order in a query result without ORDER BY....
https://stackoverflow.com/questions/12927268/sum-of-grouped-count-in-sql-query
Determine the number of NA values in a column - Stack Overflow
...I want to count the number of NA values in a data frame column. Say my data frame is called df, and the name of the column I am considering is col. The way I have come up with is following: sapp......
https://stackoverflow.com/questions/24027605/determine-the-number-of-na-values-in-a-column
r - dplyr - summary table for multiple variables - Stack Overflow
...How to create simple summary statistics using dplyr from multiple variables? Using the summarise_each function seems to be the way to go, however, when applying multiple functions to multiple colum......
https://stackoverflow.com/questions/34594641/dplyr-summary-table-for-multiple-variables
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