squat (version 0.5.0)

qts_sample: QTS Sample Class

Description

A collection of functions that implements the QTS sample class. It currently provides the as_qts_sample() function for QTS sample coercion of lists of qts objects, the is_qts_sample() function for checking if an object is a QTS sample and the subset operator.

Usage

as_qts_sample(x)
is_qts_sample(x)
# S3 method for qts_sample
[(x, i, simplify = FALSE)

Value

An object of class qts_sample.

Arguments

x

A list of tibble::tibbles, each of which with columns time, w, x, y and z.

i

A valid expression to subset observations from a QTS sample.

simplify

A boolean value specifying whether the resulting subset should be turned into a single QTS in case the subset is of size 1. Defaults to FALSE.

Details

A QTS sample is a collection of quaternion time series (QTS), each of which is stored as a tibble::tibble with 5 columns:

• time: A first column specifying the time points at which quaternions were collected;

• w: A second column specifying the first coordinate of the collected quaternions;

• x: A third column specifying the second coordinate of the collected quaternions;

• y: A fourth column specifying the third coordinate of the collected quaternions;

• z: A fifth column specifying the fourth coordinate of the collected quaternions.

Examples

x <- vespa64$igp
y <- as_qts_sample(x)
is_qts_sample(x)
is_qts_sample(y)
x[1]
x[1, simplify = TRUE]