Given a sf object with 'XYZ' coordinates, return a vector of numeric values representing the average slope of each linestring in the sf data frame input.
The default calculates the slope using `slope_weighted()`. You can also use `slope_mean()` or any other function that takes the same inputs as these functions.
Arguments
- path
an XYZ LINESTRING representing the path of travel
- fun
The slope function to calculate per element, `slope_weighted` is the default.
- directed
Should the value be directed? `FALSE` by default. If `TRUE` the result will be negative when it represents a downslope (when the end point is lower than the start point).
Value
A vector of slopes associated with each linear element The value is a proportion representing the change in elevation for a given change in horizontal distance.
See also
Other hydraulics:
compute_hydraulic_params(),
compute_n(),
cross_section(),
extract_thalweg(),
slope_matrix()