which_min_iv {dvmisc}

Return Index of (First) Minimum of an Integer Vector

Description

Written in C++, this function tends to run faster than which.min for large integer vectors.

Usage

which_min_iv(x)

Arguments

x

Integer vector.

Details

For optimal speed, choose the version of this function that matches the class of your x:

which_min_nv for numeric vector.
which_min_iv for integer vector.
which_min_nm for numeric matrix.
which_min_im for integer matrix.

Value

Integer value.

Examples

# For long vectors, which_min_iv is faster than which.min 
x <- rpois(10000, lambda = 15)
which.min(x) == which_min_iv(x)
benchmark(which.min(x), which_min_iv(x), replications = 5000)

# For shorter vectors, which_min_iv is slower than which.min
x <- rpois(100, lambda = 15)
which.min(x) == which_min_iv(x)
benchmark(which.min(x), which_min_iv(x), replications = 20000)