matlib 0.8.0

• add a vignette on properties of determinants (det-ex1)
• add a vignette on evaluation of determinants (det-ex2)
• add vignette on matrix inverse (inv-ex1)
• now use travis-ci to check builds
• add vignette on matrix inverse using EROs (inv-ex2)
• extended use of geometric diagrams in vignettes
• add vignette on generalized inverse (ginv)
• added J() for unit vectors, matrices
• added LU() for LU decomposition

matlib 0.7.3

• Changed gaussianElimination() by defining local ERO functions to make the algorithm clearer; in verbose mode, show each ERO.
• Added a draw argument to vectors3d() and arrows3d(), which defaults to TRUE. If FALSE, just returns returns the "reg.length" to help in scaling.
• Optionally scale error spheres (and circles) produced by regvec3d() so that they project confidence intervals on the x1 and x2 axes.
• Small cosmetic changes to regvec3d().
• showEqn() and gaussianElimination() get latex arguments, to print results in LaTeX format [thx: Phil Chalmers]

matlib 0.7.2

• added argument error.sphere to plot.regvec3d() [JF]
• remove use of lengths() in corner() to avoid R version dependency

matlib 0.7.0

• use corner() in vectors3d.Rd
• added arc() for 2D, 3D vector diagrams to show angles between vectors
• added regvec3d() for 2D, 3D vector diagrams representing a bivariate multiple regression model, lm(y ~ x1 + x2) [thx: John Fox]
• added internal .arrows() to produce nice arrows in 2D vector() diagrams
• fixed numerous small problems in vector diagrams
• fixed some erroneous statements in vignettes
• showEqn() now aligns terms vertically and prints without quotes
• reversed sense of absolute in points_on_line() and clarified documentation

matlib 0.6.0

• added vandermode() function
• added vec() convenience function to vectorize a matrix
• added is_square_matrix() tests
• added power_method(), power method for dominant eigenvector [thx: Gaston Sanchez]
• added arrows3d() for 3D geometric diagrams
• added vectors3d() for 3D geometric diagrams
• added corner() for 2D, 3D geometric diagrams
• added more documentation content to man/matlib.Rd from README.md

matlib 0.5.2

• added swp() function
• added vignette("gramreg") - Gram-Schmidt Orthogonalization and Regression

matlib 0.5.1

• added len() convenience function for Euclidean lengths
• added plotEqn3d() function using rgl to plot equations in 3 unknowns
• reorganized matlib.R to become a package .Rd document
• renamed proj() -> Proj() to avoid conflict with stats::proj()
• added vectors() for plotting geometric diagrams
• added vignette("linear-equations") - Solving Linear Equations

matlib 0.4.1

Initial CRAN release