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Write_xlsx(roma_obs_bis, path = tempfile(fileext = ‘…\roma_obs_bis.Integer in the range, or an internal variable or variable function that evaluates to such a value, specifying the number of times the loop is executed. Mutate(all_bis = roma_obs$all – roma_obs$all_0_30) %>%

How to do a loop in r how to#

I used the write_xls () for excel files…without success (Error in is.ame(x) : object “roma_obs_bis” not found).ĭo you have suggestions how to overwrite existing db in Excel with the new one including the new var?

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However I have problems with your code lines at this step. I need to save the new column var (all_bis) to either the existing (roma_obs) or a new database (roma_obs_bis) in excel (would be better the first solution). I could not use the rename () function as I did not really understand its use (perhaps it is needed in case I want to replace a var rather than adding a new one?). The new var is the difference between two vars (see code below). I created a new column var (all_bis) using mutate () to add to existing ones to my database (roma_obs).

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The transmute() variants can be used similarly.Ĭoursera - Online Courses and Specialization Data science In the following sections, we’ll present only the variants of mutate().

predicate is or returns TRUE are selected. predicate: A predicate function to be applied to the columns or a logical vector. …: Additional arguments for the function calls in.funs: List of function calls generated by funs(), or a character vector of function names, or simply a function. The simplified formats are as follow: # Mutate variants The functions mutate_all() / transmute_all(), mutate_at() / transmute_at() and mutate_if() / transmute_if() can be used to modify multiple columns at once. To do so, we’ll remove the column Species as follow: my_data2 % We start by creating a demo data set, my_data2, which contains only numeric columns.