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matlib 0.9.95

• added latexMatrix() to create a symbolic matrix
• latexMatrix() made more general to handle much wider variety of cases, with LaTeX output [JF]
• this is fleshed out with an Eqn() wrapper to work with other LaTeX-generating code in the package [PC]
• added a vignette, inv-3d illustrating linear transformations and matrix inverse in 3D using rgl
• latexMatrix() gets operators for matrix arithmetic (+,-, %*%) and operators (t())
• added vignette, latex-equations.Rmd illustrating the variety of functions in the package for constructing matrix equations in LaTeX
• added functions matmult(), matsum(), matpower() similar to the operators, but providing simplify = TRUE, as.numeric = TRUE
• Eqn() gains a preview argument, rendering a LaTeX matrix expression in a Viewer pane.
• latexMatrix() now allows row/column names to be displayed with a matrix.

matlib 0.9.8

• added circle() for drawing circles in diagrams
• vectors() now handles 0-length vectors more gracefully #50.
• matrix2latex() generalized to allow different bracket types and optionally show the size of the matrix.

matlib 0.9.7

• inv() and aliases now return invisible matrix when verbose = TRUE to match behaviour of related functions (e.g., gaussianElimination())
• GramSchmidt() gains an argument, omit_zero_columns to control whether all-zero columns are retained in the output (issue #48) [Thx: @ggrothendieck]
• Merge pull request #49 from JF to retain column names in GramSchmidt().

matlib 0.9.6

• fix some subtle problems related to the use of MASS::fractions() in various display functions, #42. (Thx: Phil Chalmers)
• Fix a problem with `showEqn(…, simplify=TRUE), #45. (Thx: John Fox)
• Remove Suggests: rglwidget as this is now in the rgl package (Thx: Duncan Murdoch); Merge pull request #39 from dmurdoch/norglwidget

matlib 0.9.5

• fix ‘CRAN packages requiring webshot2 but not declaring it’
• fix error from Proj.Rd

matlib 0.9.4

• added xprod() for vector cross-product
• added data-beta vignette
• fix sprintf warning from LU [Phil Chalmers]
• better plotting of planes in plotEqn3d, alpha=0.9

matlib 0.9.3

• gaussianElimination() and friends now handle one-row or one-column matrices [suggestion of Jana Jarecki]
• improvements to plotEqn()

matlib 0.9.2

• Bug fix in arrows3d.r [Thx: Douglas Whitaker]
• Bump package version
• matlib gets a hex sticker
• Incorporated a numerical tolerance in GramSchmidt() [John Fox]
• Improved computation of SVD [John Fox]
• now export printMatrix()
• now export circle3d() [req: Marco Scazzocchio]
• now use_revdep()

matlib 0.9.1

• fix references to car datatsets -> carData

matlib 0.9.0

• showEqn() gains a reduced logical to print only the unique regression equations when a lm()-type object is passed. May be combined with the simplify logical argument for further reductions
• echelon() gains a reduced logical to indicate whether the reduced or non-reduced form is computed
• powerMethod() gains a plot = TRUE logical to draw the iteration history
• added support for 'lm' objects to showEqn() to show the design matrix equations
• added verbose option to GramSchmidt() and another example
• added printMatEqn() to print matrix expressions side-by-side
• prepare to release as a cumulative major version
• Phil Chalmers is now recognized officially as a package author [aut]

matlib 0.8.3

• rename functions for consistency: eig() -> Eigen(), point_on_line() -> pointOnLine(), power_method() -> powerMethod(), row_cofactors() -> rowCofactors(), row_minors() -> rowMinors().

• add Det() to compute determinants by elimination, from eigenvalues, or by minors and cofactors, with possibility of verbose output.

• plotEqn3d() gets an axes argument and lit to control lighting of the planes; lit solves a problem with the planes becoming indistinguishable in some rotations.

• add svdDemo() function to illustrate the SVD of a 3 x 3 matrix [thx: Duncan Murdoch]

• add symMat() to create a square symmetric matrix from a vector.

• add angle() to calculate angle between vectors

• powerMethod() gets a keep argument, for possible use in plotting the convergence of eigenvectors.

• add adjoint(), to round out methods for determinants

• add GramSchmidt() for the Gram-Schmidt algorithm on columns of a matrix. The existing function gsorth() will be deprecated and then removed.

• gsorth() has been deprecated.

• fixed use of MASS::fractions in gaussianElimination

• added printMatEqn() to print matrix expressions side-by-side

matlib 0.8.1

• remove inst/doc to satisfy CRAN

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

These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.