which_firstNA: First/last position of missing values
In hutilscpp: Miscellaneous Functions in C++
View source: R/which_firstNA.R
which_firstNA R Documentation
First/last position of missing values
Description
Introduced in v 1.6.0
Usage
which_firstNA(x)
which_lastNA(x)
Arguments
x
An atomic vector.
Value
The position of the first/last missing value in x.
Examples
N <- 1e8
N <- 1e6 # for CRAN etc
x <- c(1:1e5, NA, integer(N))
bench_system_time(which.max(is.na(x))) # 123ms
bench_system_time(Position(is.na, x)) # 22ms
bench_system_time(which_firstNA(x)) # <1ms
hutilscpp documentation built on Oct. 11, 2023, 9:06 a.m.
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View source: R/which_firstNA.R
| which_firstNA | R Documentation |
First/last position of missing values
Description
Introduced in v 1.6.0
Usage
which_firstNA(x)
which_lastNA(x)
Arguments
x |
An atomic vector. |
Value
The position of the first/last missing value in x.
Examples
N <- 1e8
N <- 1e6 # for CRAN etc
x <- c(1:1e5, NA, integer(N))
bench_system_time(which.max(is.na(x))) # 123ms
bench_system_time(Position(is.na, x)) # 22ms
bench_system_time(which_firstNA(x)) # <1ms
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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