polar_metrics: Polar metrics

In sitsfeats: Satellite Image Time Series Features

Description

The package sitsfeats provides a set of polars metrics:

• The area_q1()area of the closed shape over the first quadrant.

• The area_q2() area of the closed shape over the second quadrant.

• The area_q3() area of the closed shape over the third quadrant.

• The area_q4() area of the closed shape over the fourth quadrant

• The polar_balance() the standard deviation of the areas per season.

• The angle() the angle of the closed shape.

• The area_ts() area of the closed shape.

• The ecc_metric() return values close to 0 if the shape is a circle and 1.

• The gyration_radius() equals the average distance between each point inside.

• The csi() this is a dimensionless quantitative measure of morphology.

Usage

area_q1(timeseries)

area_q2(timeseries)

area_q3(timeseries)

area_q4(timeseries)

polar_balance(timeseries)

angle(timeseries)

area_ts(timeseries)

ecc_metric(timeseries)

gyration_radius(timeseries)

csi(timeseries)

Arguments

timeseries

a numeric or matrix object where the columns is the point in time.

Value

a numeric vector for each metric in each time series

Examples

data("timeseries")
areas_values <- rbind(sitsfeats::area_q1(timeseries),
                      sitsfeats::area_q2(timeseries),
                      sitsfeats::area_q3(timeseries),
                      sitsfeats::area_q4(timeseries))

sitsfeats documentation built on June 4, 2021, 9:05 a.m.