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matlib 1.0.1

  • Rename vignettes to put them in order
  • Add papers/matlib-useR-2016.pdf to avoid bad URL
  • Consolidate options for print.latexMatrix
  • Fix bug in print.latexMatrix(sparse=TRUE)

matlib 1.0.0

  • 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