Create an object of class point from a data frame.
An object of class point represents the observed data of a spatial process. This includes the spatial location of sampling sites and
the values observed at those sites. A point object is stored as a data frame. The data frame must contain one column for the X
coordinate and one column for the Y coordinate of each point, as well as any number of columns representing data observed at the
points.
Usage
point(dframe, x='x', y='y')
Arguments
dframe
a data frame containing the x and y coordinates for each point and the variables observed at each point
x
the name of the column in dframe that contains the x coordinate
y
the name of the column in dframe that contains the y coordinate