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Questions tagged [tidyeval]

Please use this tag for questions about using tidy evaluation within the tidyverse framework. For more information please refer to this handbook: https://tidyeval.tidyverse.org/

473 questions
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rlang: Input should be both a symbol and a string

So I need one of the arguments to be a symbol and the usual !!enquo(column) works, but I also need to make a dplyr join latter in the code using the same column. Is there a problem with this? The code works I just want to know if it is correct. f…
xhr489
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Error getting column name using R tidyeval

I am writing a generalized lookup function to execute against a tibble. When I run the code below, I get "Error: object 'x' not found" My real function returns a different error message, but I think some guidance on this will help. See the code…
Charles Knell
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How do I capture the argument to a function and apply them as is in another context/environment

I am pretty sure my language is imprecise, but I don't know the correct terms yet. This is what I wanted to achieve: I have a function abc2. I want to obtain the arguments to them (without evaluating or changing the argument) provided by the user,…
xiaodai
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Tidyeval in a function with dplyr and ggplot2

So I create the name with :=, but I want to use it in ggplot2 as y which does not seem to work. library(tidyverse) date_group_plot_line <- function(df, group_col, summarise_col) { group_col <-enquo(group_col) summarise_col <-…
xhr489
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Using the pipe in selfmade function with tidyeval (quo_name)

I have two functions: date_diff and group_stat. So I have read this article tidyverse and I try so create simple functions and use the pipe. The first function creates a difftime and names them timex_minus_timey but when I pipe this result into the…
xhr489
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Set paramenter of a function using difftime and dplyr

How can I set the paramenter units ="mins" in the following function as a parameter? This is just the data frame: library(tidyverse) u <- runif(10, 0, 60) w <- runif(10, 0, 60) df <- tibble(time_1 = as.POSIXct(u, origin = "2019-02-03…
xhr489
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How can I use Quasiquotation in the context of tidyeval in tidyverse scoped verbs or a mapper?

I am having trouble using the special operator := (colon-equals) in a mapper function. I have found a workaround using a scoped-verb from the tidyverse but I would like to know in what way the special operator is implemented in a mapper…
mral
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Parsing overloaded column in dataframe - creating multiple columns with one mutate statement

I have an overloaded column, overloadedin a dataframe containing values like 143 or 23 or 12789. df <- data_frame(id = 1:3, overloaded = c("145", "459", "2")) I want to parse this column into 9 new boolean columns. df %>% …
Rickard
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How to pass a list of of variables to a function but also considering quosures and quoting

I'd like to pass a list of variables to a function, but I'm confused by the quoting and quosures. Normally, I want to return a df after some kind of data management has been done--after the function has been applied to several variables. As it is…
23stacks1254
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Downloading/installing package from github converting underlying R code

I have a private R package on github that I have made. I make use of !!rlang::sym(function_argument) frequently to accept inputs from functions and use with tidyverse. For example: example_function = function(x){ new = mtcars %>%…
runningbirds
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Function issue. Tidyeval filtering

What is wrong here? This works: iris %>% filter(Species == "setosa") %>% summarise(msl = mean(Sepal.Length), msw = mean(Petal.Width)) and produces: msl msw 1 5.006 0.246 But this function doesn't work: means <- function(data, value){ …
william3031
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Using tidy evaluation function inside mutate without explicit reference to original dataframe

I'd like to create a function that works inside of mutate. As a simple example, I can get this to work: library(tidyverse) # Toy Data df <- tibble::tribble( ~id, ~first_name, ~gender, ~height, 1, "john", "m", 71, 2, "jane", …
Brad Cannell
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Passing columns names to group_by and ggplot2 within a custom function

My data-frame has multiple categorical columns, I want to compare each column the with fixed column and generate the bar graph with facet_grid(). For that I want to write a function. library(rlang) library(tidyverse) qw <- structure(list(weekday =…
dondapati
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Filter Dataframe with Tidy Evaluation

I am handling a large dataset. First, for certain columns (X1, X2, ...), I am trying to identify a range of value (a, b) consists of repeated value (a > n, b > n). Next, I wish to filter row based on the condition which matches respective columns to…
ThomasJc
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Color plotly with tidyeval

I'm trying to create a plotly barchart using some tidyeval functionality. I have succeeded in creating a simple barchart but can not seem to make a stacked barchart colored by an attribute. Have been stuck at this for a while and cannot seem to…
Mridul Garg
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