BGRAPH: A Program for Biplot Multivariate Graphics

BGRAPH (Tsianco, 1980) is an inter-active conversational program to perform biplot multivariate graphics. The program generates two-and three-dimensional biplot displays based on the singular value decomposition (SVD) of a matrix and the resulting rank 2 or 3 approximations. Three dimensional displays may be either orthogonal projections, perspective projections, stereograms or analyglyphs. Other capabilities of the program include subset selection, selective labeling of points, rotation of axes, construction of ellipsoids of concentration, MANOVA biplots and plot storage.