sample.systematic: take (a) systematic sample(s) from a vector

In jstrunk001/RSForInvt: Remote Sensing FORest INVenTory related analysis tasks, especially FUSION, lidR, NVEL

take (a) systematic sample(s) from a vector

Description

take (a) systematic sample(s) from a vector

Usage

sample.systematic(N, n = NA, exact_n = T, as_idx = T)

Arguments

N	vector length
n	length of sample (optionally a vector of samples)
exact_n	should n be matched exactly
as_idx	should a numeric index be return (T) or T/F vector (F)

Details

This program is free software but it is provided WITHOUT WARRANTY and with ABSOLUTELY NO GUARANTEE of fitness or functionality for any purpose; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

Revision History

1.0	7/13/2021 Implemented
1.1	date and revisions..

Value

vector of numeric indices or T/F vector of length N vector of 0's (not sampled) and group ids 1:n for sampled items if length(n) > 1

Author(s)

Jacob Strunk <[e-mail]>

See Also

sample
which

Examples

 sample.systematic(2000, 25)
 sample.systematic(205, n=c(50,50))

jstrunk001/RSForInvt documentation built on April 18, 2022, 11:03 p.m.