Linear 2D Plot with Rainbow Color

This function plots a line colored like a rainbow.

This function plots a line colored like a rainbow. The line is defined by x versus y pairs, which is the same as a regular 2-D plot. This program is inspired by Jonathan Zarge's post at http://groups.google.com/group/comp.soft-sys.matlab/browse_frm/thread/70b82349e102d792?tvc=1&q=matlab+2d+plot+rainbow&hl=en