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2. r - Extract the first (or last) n characters of a string - Stack...

   stackoverflow.com/questions/15897236

   For those coming from Microsoft Excel or Google Sheets, you would have seen functions like LEFT(), RIGHT(), and MID().

3. r - Pass a data.frame column name to a function - Stack Overflow

   stackoverflow.com/questions/2641653

   new_column3 <- function(df,col_name,expr){ df %>% mutate({{col_name}} := eval_tidy(enquo(expr), df)) } I'm not an expert in evaluation in R and might have done an over simplification, or used a wrong term, so please correct me in the comments. I hope to have helped in comparing the different tools used in the answers to this question.

4. r - passing function argument to dplyr select - Stack Overflow

   stackoverflow.com/questions/22919448

   Reference a variable inside select function in R. 2. pass arguments when pipe is called inside a function. 7.

5. r - Select columns based on string match - Stack Overflow

   stackoverflow.com/questions/25923392

   I have a data frame ("data") with lots and lots of columns. Some of the columns contain a certain string ("search_string"). How can I use dplyr::select() to give me a subset including only the col...

6. select command not working in R even after installing the library...

   stackoverflow.com/questions/48754775

   In this case specifically, the function "select" exists in the package 'dplyr' and 'MASS'. If you type in select in your code it's likely going to pull the MASS library, and if your intention is select only certain columns out of a data frame then, you want to the select from 'dplyr'. For example: dplyr::select(-x, -y, -z) # remove the x, y ...

7. r - Combining select () and filter () - Stack Overflow

   stackoverflow.com/questions/52934590

   The only thing that will be relevant is the order of the operation. The one inside will happen before the one outside. So if you put select (filter ()) it will first filter the data.frame, and then select the variables you want. If you run filter (select ()), it will first select the variables, and then filter it. answered Oct 22, 2018 at 17:47.

8. r - Error with select function from dplyr - Stack Overflow

   stackoverflow.com/questions/46325145

   This is quite old, but just to fill the information from the comments into an actual answer: This is indeed caused by a name clash with another package; 99(.9?)% of the time the particular package at "fault" will be the MASS package, which has a (poorly documented) select() function (which is intended for extracting the optimal penalization parameter for a ridge regression).

9. r - dplyr: conditional column selection using select_if() - Stack...

   stackoverflow.com/questions/54153011

   A follow-up from a previous question... How to select all columns based on a type, with the exception of one column based on a select helper function?

10. What is the most efficient way to select a set of variable names...

    stackoverflow.com/questions/9425194

    I often need to select a set of variables from a data.frame in R. My research is in the social and behavioural sciences, and it is quite common to have a data.frame with several hundreds of variables (e.g., there'll be item level information for a range of survey questions, demographic items, performance measures, etc., etc.).

11. r - How NOT to select columns using select () dplyr when you have...

    stackoverflow.com/questions/49582602

    Edit: OP's actual question was about how to use a character vector to select or deselect columns from a dataframe.