makeYagi: Create a yagi antenna object.
In jbrzusto/sensorgnome-R-package: Tools for the sensorgnome project.

Creates a 'proto' object of class 'antenna' which will store position and axis orientations of a Yagi-Uda antenna.

1	makeYagi(n, pos, axis1, axis2)

`n`	integer; number of elements (cross pieces) of the antenna. So far, only antennas with 5 and 9 elements are supported.
`pos`	3-element antenna position vector (x, y, z)
`axis1`	orientation of main antenna axis. This is one of the following: "vertical"; this represents an atenna pointing straight up a single number; this represents the azimuth (degrees clockwise from North) of an antenna oriented parallel to the ground a 2-vector; this represents azimuth and elevation angles (degrees clockwise from North, degrees above the horizon) for an antenna pointing in an arbitrary direction a 3-vector; this is a vector giving the direction (x, y, z) in which the antenna is pointing
`axis2`	orientation of the antenna elements ('cross pieces') relative to the antenna axis. Specified as one of the following: "horizontal": the elements are parallel to the ground "vertical": the elements are vertical a single number: the angle of rotation of the elements when viewed from the antenna base (wider end) toward the antenna tip. Angle is measured clockwise in degrees, starting at 0 for horizontal. So 0 is the same as "horizontal" and 90 is the same as "vertical". a 2-vector: this represents azimuth and elevation angles (degrees clockwise from North, degrees above the horizon) for the antenna elements, and must be perpendicular to the `axis1` parameter a 3-vector: this is a vector giving the direction (x, y, z) in which the antenna elements are pointing. It must be perpendicular to the `axis1` parameter.