Determine shapes

This unexported helper function is used to identify the shape in the plane_shape() function's scaled difference ("sdiff") method.

Usage

get_shapes(input_data, window_size)

Arguments

input_data

A data frame containing at least two columns, one of which must be named "value" with the value assessed and another named "dates" with the date for the observed data

window_size

The number of of categorical differences used to define the shape

Value

A vector with the shapes identified. Each element of the vector will include a shape, which is a cluster of categorical differences (of the same size as the specified "window_size") collapsed with ";" (e.g., c("decrease;stable;stable;stable","stable;stable;stable;increase","stable;stable;increase;increase")).