Questions about `r` package `tidyselect` used in many functions from the `tidyverse` packages
Questions tagged [tidyselect]
88 questions
2
votes
3 answers
What is the recommended alternative for the deprecated .data[[ ]] in mutate()?
As of tidyselect 1.2.0 the use of .data[[ ]] is now deprecated.
Now I wonder how you can alias a column while using a vector with the column name of the target column.
What I used to do:
mycolname <- 'cyl'
mtcars %>% mutate(newcol =…
saQuist
- 416
- 7
- 19
2
votes
1 answer
Is it possible to use tidyselect helpers with the cols_only() function?
I have a .csv file like this (except that the real .csv file has many more columns):
library(tidyverse)
tibble(id1 = c("a", "b"),
id2 = c("c", "d"),
data1 = c(1, 2),
data2 = c(3, 4),
data1s = c(5, 6),
data2s =…
nicholas
- 903
- 2
- 12
2
votes
1 answer
Custom function: Return a tidyselect argument as character-string, without executing the argument
I would like to create a segment in my custom function where the input of the argument "evars" is returned as a character string, without executing/evaluating the argument. The argument is a tidyselect function used to extract specified columns from…
daems013
- 45
- 5
2
votes
1 answer
Check if a tidyselect is NULL and if so, set a default tidyselect method
I am struggling to set a default selection method if NULL is given.
For example, let's say I want to implement a function that squares all values for some tidyselect method, symbol, or string, and if none is given, then by default it squares all…
Baraliuh
- 2,009
- 5
- 11
2
votes
0 answers
Unable to find an inherited method for function ‘coordinates’ for signature ‘"tbl_df"’
When I was trying to create a spatial point data frame in R a sudden error appeared that made it unable for me to create a new SpatialPointdataFrame. The odd thing was that earlier I used the exact same code as before and it succeeded…
Ruben Leroy
- 31
- 6
2
votes
2 answers
Pass column names to dplyr::coalesce() when writing a custom function
I'm trying to write a function that will wrap dplyr::coalesce(), and will take in a data object and column names to coalesce. So far, my attempts have failed.
Example data
library(dplyr)
df <-
data.frame(col_a = c("bob", NA, "bob", NA, "bob"),
…
Emman
- 3,695
- 2
- 20
- 44
2
votes
1 answer
R: adapt mutate call from handling three binary variables to n binary variables
I've got a dataframe with 3 binary variables that relate to time period 1 and three corresponding variables that relate to time 2.
df <- data.frame("user" = c("a","b","c","d","e"), "item_1_time_1" = c(1,0,0,0,NA), "item_2_time_1" = c(1,1,1,0,NA),…
JRR
- 578
- 5
- 21
2
votes
1 answer
pivot_longer with tidyselect where, where but doesnt predicates?
I am trying to use the tidyselect function where with pivot_longer and am getting the error that the tidyselect package doesn't support predicates. That was seem somewhat unreasonable, so most likely I have a syntax error. (I realize that SO is…
Harlan Nelson
- 1,394
- 1
- 10
- 22
2
votes
2 answers
How to initialize a variable with a tidyselect helper?
I'm using tidyselection in some function, and I have to concatenate the first argument with the ellipsis as it could be a specific class that would need a specific treatment.
The normal behavior is this:
foo = function(x, ...){
xloc =…
Dan Chaltiel
- 7,811
- 5
- 47
- 92
2
votes
1 answer
Use tidyselect select helpers in functions that do not implement them
How to use dplyr/tidyselect "select helpers", such as : to select a range of consecutive variables, in functions that do not implement them?
If possible in a simple/elegant manner (of course this is subjective).
Here is an example with…
Aurèle
- 12,545
- 1
- 31
- 49
2
votes
1 answer
Unable to use tidyselect `everything()` in combination with `group_by()` and `fill()`
library(tidyverse)
df <- tibble(x1 = c("A", "A", "A", "B", "B", "B"),
x2 = c(NA, 8, NA, NA, NA, 5),
x3 = c(3, 6, 5, 9, 1, 9))
#> # A tibble: 6 x 3
#> x1 x2 x3
#>
#> 1 A NA 3
#> 2 A …
Display name
- 4,153
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- 27
- 75
2
votes
2 answers
Use starts_with inside map instead of explicitly naming
I want to apply a function inside a tibble but I don't want to explicitly Name the columns. E.G.
library(tidyverse)
library(tidyselect)
test = tibble(var1 = c("la", "le", "lu"), var2 = c("ma", "me", "mu"), var3 = c("fi", "fa", "fu"),…
MichaelA
- 1,866
- 2
- 23
- 38
2
votes
1 answer
regex (in gathering multiple sets of columns with tidyr)
inspired by hadley's nifty gather approach in this answer I tried to use tidyr's gather() and spread() in combination with a regular expression, regex, but I seem to get it wrong on the regex.
I did study several regex questions; this one, this one,…
Eric Fail
- 8,191
- 8
- 72
- 128
2
votes
1 answer
dplyr everything() argument string select_
I need to use the underscored string version of select in dplyr along with the everything() argument. It is not working.
library(dplyr)
#this works just fine
select(iris, Species, everything()) %>% head()
Species Sepal.Length Sepal.Width…
Nick Criswell
- 1,733
- 2
- 16
- 32
1
vote
2 answers
mutate_at with all_of() in r?
Trying to future proof some code here. I was unable to figure out this following warning message:
snpdata <- snpdata %>%
mutate_at(vars(snpcol_start:snpcol_end),
list(~ ifelse(. == 0, "AA", ifelse(. == 1, "AB", .))))
Warning…
Ahmed Ayub Khan
- 11
- 1