This function takes a dataset containing both complete and incomplete specimens and removes all incomplete specimens.
A n* l X 2 matrix of coordinate data, where n is the number of specimens and l is the number of landmarks. All landmarks from one specimen should be grouped together.
The number of landmarks per specimen
Returns an c * l X 2 matrix of landmark data, where c is the number of complete specimens and l is the number of landmarks.
Arbour, J. and Brown, C. In Press. Incomplete specimens in Geometric Morphometric Analyses. Methods in Ecology and Evolution