tidyeval functions and problems with `View()`
1
Code chunk #1 and #2 are identical, except for line number 14. Code chunk #1 uses a print() call and code chunk #2 uses the View() call. Code chunk #1 works fine. Code chunk #2 gives the error "Error in FUN(X[[i]], ...) : object 'cal.date' not found". Why?
1
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% print() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
2
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% View() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
r function dplyr tidyeval
edited Nov 12 '18 at 20:25
Calum You
7,0171729
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
add a comment |
1
Code chunk #1 and #2 are identical, except for line number 14. Code chunk #1 uses a print() call and code chunk #2 uses the View() call. Code chunk #1 works fine. Code chunk #2 gives the error "Error in FUN(X[[i]], ...) : object 'cal.date' not found". Why?
1
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% print() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
2
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% View() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
r function dplyr tidyeval
edited Nov 12 '18 at 20:25
Calum You
7,0171729
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
add a comment |
1
1
1
Code chunk #1 and #2 are identical, except for line number 14. Code chunk #1 uses a print() call and code chunk #2 uses the View() call. Code chunk #1 works fine. Code chunk #2 gives the error "Error in FUN(X[[i]], ...) : object 'cal.date' not found". Why?
1
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% print() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
2
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% View() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
r function dplyr tidyeval
edited Nov 12 '18 at 20:25
Calum You
7,0171729
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
Code chunk #1 and #2 are identical, except for line number 14. Code chunk #1 uses a print() call and code chunk #2 uses the View() call. Code chunk #1 works fine. Code chunk #2 gives the error "Error in FUN(X[[i]], ...) : object 'cal.date' not found". Why?
1
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% print() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
2
library(tidyverse)
set.seed(1)
graph.data <- tibble(cal.date = as.Date(40100:40129, origin = "1899-12-30"),
random_num = rnorm(30, 8, 5))
child_function <- function(df, variable, hor.line = 6) {
variable <- enquo(variable)
df <- df %>% mutate(mutation = 2 * !!variable, horizontal.line = hor.line)
}
parent_function <- function(df, date, variable, hor.line = 6) {
date <- enquo(date)
variable <- enquo(variable)
df <- df %>% child_function(!!variable, hor.line) %>% View() # LINE 14
p <- ggplot(df, aes(!!date, mutation)) +
geom_point() +
geom_hline(aes(yintercept = hor.line))
p
}
parent_function(graph.data, date = cal.date, variable = random_num, hor.line = 8)
r function dplyr tidyeval
r function dplyr tidyeval
edited Nov 12 '18 at 20:25
Calum You
7,0171729
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
edited Nov 12 '18 at 20:25
Calum You
7,0171729
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
edited Nov 12 '18 at 20:25
Calum You
7,0171729
edited Nov 12 '18 at 20:25
Calum You
7,0171729
edited Nov 12 '18 at 20:25
Calum You
7,0171729
7,0171729
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
asked Nov 12 '18 at 20:12
stackinatorstackinator
1,214419
1,214419
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
5
View() is a side effect function and does not return anything.
Use %T>% from the magrittr package instead of %>% for your second case.
View() ends the pipe such that you will want to have a T pipe instead. I think you can see it more clearly like this
df %>% child_function(!!variable, hor.line) %>% View() -> df
vs.
df %>% child_function(!!variable, hor.line) %T>% View() -> df
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
1
I think this requires an explicitlibrary(magrittr)
– Calum You
Nov 12 '18 at 20:24
@CalumYou, You are right! I always forget thattidyversedoes not load it
– Jrakru56
Nov 12 '18 at 20:25
2
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
5
View() is a side effect function and does not return anything.
Use %T>% from the magrittr package instead of %>% for your second case.
View() ends the pipe such that you will want to have a T pipe instead. I think you can see it more clearly like this
df %>% child_function(!!variable, hor.line) %>% View() -> df
vs.
df %>% child_function(!!variable, hor.line) %T>% View() -> df
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
1
I think this requires an explicitlibrary(magrittr)
– Calum You
Nov 12 '18 at 20:24
@CalumYou, You are right! I always forget thattidyversedoes not load it
– Jrakru56
Nov 12 '18 at 20:25
2
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
add a comment |
5
View() is a side effect function and does not return anything.
Use %T>% from the magrittr package instead of %>% for your second case.
View() ends the pipe such that you will want to have a T pipe instead. I think you can see it more clearly like this
df %>% child_function(!!variable, hor.line) %>% View() -> df
vs.
df %>% child_function(!!variable, hor.line) %T>% View() -> df
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
1
I think this requires an explicitlibrary(magrittr)
– Calum You
Nov 12 '18 at 20:24
@CalumYou, You are right! I always forget thattidyversedoes not load it
– Jrakru56
Nov 12 '18 at 20:25
2
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
add a comment |
5
5
5
View() is a side effect function and does not return anything.
Use %T>% from the magrittr package instead of %>% for your second case.
View() ends the pipe such that you will want to have a T pipe instead. I think you can see it more clearly like this
df %>% child_function(!!variable, hor.line) %>% View() -> df
vs.
df %>% child_function(!!variable, hor.line) %T>% View() -> df
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
View() is a side effect function and does not return anything.
Use %T>% from the magrittr package instead of %>% for your second case.
View() ends the pipe such that you will want to have a T pipe instead. I think you can see it more clearly like this
df %>% child_function(!!variable, hor.line) %>% View() -> df
vs.
df %>% child_function(!!variable, hor.line) %T>% View() -> df
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
edited Nov 12 '18 at 20:26
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
answered Nov 12 '18 at 20:20
Jrakru56Jrakru56
597111
597111
1
I think this requires an explicitlibrary(magrittr)
– Calum You
Nov 12 '18 at 20:24
@CalumYou, You are right! I always forget thattidyversedoes not load it
– Jrakru56
Nov 12 '18 at 20:25
2
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
add a comment |
1
I think this requires an explicitlibrary(magrittr)
– Calum You
Nov 12 '18 at 20:24
@CalumYou, You are right! I always forget thattidyversedoes not load it
– Jrakru56
Nov 12 '18 at 20:25
2
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
1
1
I think this requires an explicit
library(magrittr)– Calum You
Nov 12 '18 at 20:24
I think this requires an explicit
library(magrittr)– Calum You
Nov 12 '18 at 20:24
@CalumYou, You are right! I always forget that
tidyverse does not load it– Jrakru56
Nov 12 '18 at 20:25
@CalumYou, You are right! I always forget that
tidyverse does not load it– Jrakru56
Nov 12 '18 at 20:25
2
2
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
Yeah, it's a little annoying but magrittr has name collisions with other tidyverse functions (extract, set_names). I hope they rename one or the other at some point since having the T and assignment pipes is nice
– Calum You
Nov 12 '18 at 20:27
add a comment |
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