helper function to check the input of binning
Arguments
- bin_param
A numeric vector indicating the size of the bin. If the
bin_type
is "square" or "rectangle", this will be a vector of length two giving the numbers of rectangular quadrats in the x and y directions. If thebin_type
is "hexagonal", this will be a number giving the side length of hexagons. Positive numbers only.- bin_type
A string indicating which bin shape is to be used for vectorization. One of "square" (default), "rectangle", or "hexagon".
- w_x
A numeric vector of length two specifying the x coordinate limits of enclosing box.
- w_y
A numeric vector of length two specifying the y coordinate limits of enclosing box.