firstNA: Position of first NA
In bit: Classes and Methods for Fast Memory-Efficient Boolean Selections
firstNA R Documentation
Position of first NA
Description
This is substantially faster than which.max(is.na(x))
Usage
firstNA(x)
Arguments
x
an R vector
Value
a reversed vector
See Also
which.max(), is.na(), anyNA(), anyDuplicated(), bit_anyDuplicated()
Examples
x <- c(FALSE, NA, TRUE)
firstNA(x)
reverse_vector(x)
## Not run:
x <- 1:1e7
system.time(rev(x))
system.time(reverse_vector(x))
## End(Not run)
bit documentation built on April 4, 2025, 3:09 a.m.
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| firstNA | R Documentation |
Position of first NA
Description
This is substantially faster than which.max(is.na(x))
Usage
firstNA(x)
Arguments
x |
an R vector |
Value
a reversed vector
See Also
which.max(), is.na(), anyNA(), anyDuplicated(), bit_anyDuplicated()
Examples
x <- c(FALSE, NA, TRUE)
firstNA(x)
reverse_vector(x)
## Not run:
x <- 1:1e7
system.time(rev(x))
system.time(reverse_vector(x))
## End(Not run)
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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