Questions tagged [standard-evaluation]
24 questions
1
vote
1 answer
SE issue with conditional mutate
I'm trying to do a simple conditional with mutate.
The code should create a new variable called "gender" based on two variables from same dataframe.
sample <- data.frame(
client = c("john", "peter", "hanna", "lisa"),
id = c(100, 400, 650,…
Prometheus
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1
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1 answer
How should I use the uq() function inside a package?
I'm puzzled by the behaviour of the uq() function. The behavior is not the same when I use uq() or lazyeval::uq().
Here is my reproducible example :
First, I generate a fake dataset
library(tibble)
library(lazyeval)
fruits <- c("apple", "banana",…
PAC
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1
vote
1 answer
Standard evaluation with mutate_ to calculate percentages by group
I am trying to use standard evaluation with dplyr to calculate percents as a function of two grouping variables. The problem is in my mutate_ statement.
Here is a dataset:
structure(list(
var1 = structure(c(2L, 1L, 1L, 2L, 1L, 2L, 1L,
2L,…
Chris
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1
vote
1 answer
Why do i got different results using SE or NSE dplyr functions
Hi I got differents results from dplyr function when I use standard evaluation through lazyeval package.
Here is how to reproduce something close to my real datas with 250k rows and about 230k groups. I would like to group by id1, id2 and subset the…
Julien Navarre
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1
vote
1 answer
plyr functions and standard evaluation
I would like to wrap plyr functions in my own functions. I want to pass to the function an object and the variable (unquoted) on which apply a cut function.
x <- data.frame(time = seq(Sys.Date() - 99, Sys.Date(), 1))
dlply(x, .(week = cut(time, "1…
Julien Navarre
- 7,653
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0
votes
1 answer
R - Defining a function which recognises arguments not as objects, but as being part of the call
I'm trying to define a function which returns a graphical object in R. The idea is that I can then call this function with different arguments multiple times using an for loop or lapply function, then plotting the list of grobs in…
Peter
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0
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0 answers
dplyr mutate use standard evaluation
I would like to reference in a dplyr mutate phrase to an object which includes the variable name in my data frame. How can I use standard evaluation in my case:
Here is some dummy…
Fred
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0
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1 answer
R dplyr resolve variable in conditional filter
I am trying to filter based on a variable value, and have tried multiple combinations of filter_, dots and quotes to no avail.
As an example, I have a
runlist = c(1, 2, 3, 4, 5)
and a dataframe boo
run <- rep(seq(5), 3)
edge1 <- sample(20,…
zazizoma
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0
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0 answers
standard evaluation version of dplyr filter appears to be ignored
I'm trying to write a function in which a user will specify a dataframe and a
column name (string) and have the string be passed to the dplyr filter function.
I am confident that I am supposed to be using filter_, but I cannot seem to get it to…
joemienko
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