polysection

This function carries out the following tasks:

1) Imports a set of xyz scatter data, interpolates them to a uniform mesh, and creates a contour map figure of the results.

2) Allows for the user to interactively select a series of waypoints by selecting them using 'getpts' on the figure.

3) Creates a series of evenly spaced cross sections perpendicular to the polyline created by the waypoints.

4) Exports the results as a 3-D graphic.

5) Exports the cross section xyz coordinates to Excel as 'CSData.xls', where each cross section has its own worksheet.

An example scatter data set 'Scatter.dat' has been included.