How can I avoid “$ operator is invalid for atomic vectors”
I have a loop running to assign values
for (i in 1:4)
t[i]<-print(noquote(paste0("t_",i)))
the output of which is
[1] t_1
[1] t_2
[1] t_3
[1] t_4
Now when I try to run it along with a function
for (i in 1:length(t))
print(sum(t[i]$total_counts))
it throws up an error: Error: $ operator is invalid for atomic vectors
however, it works fine, if i run it like
sum(t_1$total_counts)
[1] 27347116
what shall I adjust to make my code running in a loop.
Please suggest.
r
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
add a comment |
I have a loop running to assign values
for (i in 1:4)
t[i]<-print(noquote(paste0("t_",i)))
the output of which is
[1] t_1
[1] t_2
[1] t_3
[1] t_4
Now when I try to run it along with a function
for (i in 1:length(t))
print(sum(t[i]$total_counts))
it throws up an error: Error: $ operator is invalid for atomic vectors
however, it works fine, if i run it like
sum(t_1$total_counts)
[1] 27347116
what shall I adjust to make my code running in a loop.
Please suggest.
r
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
2
mtcars$cyl[1]is a valid reference,mtcars[1]$cylis not
– Mako212
Nov 20 '18 at 22:53
add a comment |
I have a loop running to assign values
for (i in 1:4)
t[i]<-print(noquote(paste0("t_",i)))
the output of which is
[1] t_1
[1] t_2
[1] t_3
[1] t_4
Now when I try to run it along with a function
for (i in 1:length(t))
print(sum(t[i]$total_counts))
it throws up an error: Error: $ operator is invalid for atomic vectors
however, it works fine, if i run it like
sum(t_1$total_counts)
[1] 27347116
what shall I adjust to make my code running in a loop.
Please suggest.
r
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
I have a loop running to assign values
for (i in 1:4)
t[i]<-print(noquote(paste0("t_",i)))
the output of which is
[1] t_1
[1] t_2
[1] t_3
[1] t_4
Now when I try to run it along with a function
for (i in 1:length(t))
print(sum(t[i]$total_counts))
it throws up an error: Error: $ operator is invalid for atomic vectors
however, it works fine, if i run it like
sum(t_1$total_counts)
[1] 27347116
what shall I adjust to make my code running in a loop.
Please suggest.
r
r
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
asked Nov 20 '18 at 22:50
AngeloAngelo
1,66962345
1,66962345
2
mtcars$cyl[1]is a valid reference,mtcars[1]$cylis not
– Mako212
Nov 20 '18 at 22:53
add a comment |
2
mtcars$cyl[1]is a valid reference,mtcars[1]$cylis not
– Mako212
Nov 20 '18 at 22:53
2
2
mtcars$cyl[1] is a valid reference, mtcars[1]$cyl is not– Mako212
Nov 20 '18 at 22:53
mtcars$cyl[1] is a valid reference, mtcars[1]$cyl is not– Mako212
Nov 20 '18 at 22:53
add a comment |
1 Answer
1
active
oldest
votes
I assume that t_1 to t_n are the names of objects in your environment and that you want to loop over said objects and perform an operation. in which case you need to use get:
t_1 <- data.frame(x=1:10, y = 11:20)
t <- "t_1"
sum(get(t[1])$x)
#[1] 55
As @joran suggests, the better way to do this is to collect all of the t_n objects into a list and then operate over the list.
t_list <- mget(t)
lapply(t_list, function(df) sum(df$x))
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
2
Rather than encourage this somewhat problematic code pattern, you could recommendmgetas a way to collect all thoset_*objects into a named list.
– joran
Nov 20 '18 at 23:06
add a comment |
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1 Answer
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1 Answer
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active
oldest
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active
oldest
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active
oldest
votes
I assume that t_1 to t_n are the names of objects in your environment and that you want to loop over said objects and perform an operation. in which case you need to use get:
t_1 <- data.frame(x=1:10, y = 11:20)
t <- "t_1"
sum(get(t[1])$x)
#[1] 55
As @joran suggests, the better way to do this is to collect all of the t_n objects into a list and then operate over the list.
t_list <- mget(t)
lapply(t_list, function(df) sum(df$x))
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
2
Rather than encourage this somewhat problematic code pattern, you could recommendmgetas a way to collect all thoset_*objects into a named list.
– joran
Nov 20 '18 at 23:06
add a comment |
I assume that t_1 to t_n are the names of objects in your environment and that you want to loop over said objects and perform an operation. in which case you need to use get:
t_1 <- data.frame(x=1:10, y = 11:20)
t <- "t_1"
sum(get(t[1])$x)
#[1] 55
As @joran suggests, the better way to do this is to collect all of the t_n objects into a list and then operate over the list.
t_list <- mget(t)
lapply(t_list, function(df) sum(df$x))
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
2
Rather than encourage this somewhat problematic code pattern, you could recommendmgetas a way to collect all thoset_*objects into a named list.
– joran
Nov 20 '18 at 23:06
add a comment |
I assume that t_1 to t_n are the names of objects in your environment and that you want to loop over said objects and perform an operation. in which case you need to use get:
t_1 <- data.frame(x=1:10, y = 11:20)
t <- "t_1"
sum(get(t[1])$x)
#[1] 55
As @joran suggests, the better way to do this is to collect all of the t_n objects into a list and then operate over the list.
t_list <- mget(t)
lapply(t_list, function(df) sum(df$x))
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
I assume that t_1 to t_n are the names of objects in your environment and that you want to loop over said objects and perform an operation. in which case you need to use get:
t_1 <- data.frame(x=1:10, y = 11:20)
t <- "t_1"
sum(get(t[1])$x)
#[1] 55
As @joran suggests, the better way to do this is to collect all of the t_n objects into a list and then operate over the list.
t_list <- mget(t)
lapply(t_list, function(df) sum(df$x))
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
edited Nov 20 '18 at 23:09
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
answered Nov 20 '18 at 23:04
emilliman5emilliman5
4,00321529
4,00321529
2
Rather than encourage this somewhat problematic code pattern, you could recommendmgetas a way to collect all thoset_*objects into a named list.
– joran
Nov 20 '18 at 23:06
add a comment |
2
Rather than encourage this somewhat problematic code pattern, you could recommendmgetas a way to collect all thoset_*objects into a named list.
– joran
Nov 20 '18 at 23:06
2
2
Rather than encourage this somewhat problematic code pattern, you could recommend
mget as a way to collect all those t_* objects into a named list.– joran
Nov 20 '18 at 23:06
Rather than encourage this somewhat problematic code pattern, you could recommend
mget as a way to collect all those t_* objects into a named list.– joran
Nov 20 '18 at 23:06
add a comment |
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2
mtcars$cyl[1]is a valid reference,mtcars[1]$cylis not– Mako212
Nov 20 '18 at 22:53