`gaussianElimination()`

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

- 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()

- fix references to car datatsets -> carData

`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]

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 determinantsadd

`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

- remove inst/doc to satisfy CRAN

- 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

- 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]

- added argument
`error.sphere`

to`plot.regvec3d()`

[JF] - remove use of
`lengths()`

in`corner()`

to avoid R version dependency

- 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

- 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`

- added
`swp()`

function - added
`vignette("gramreg")`

-*Gram-Schmidt Orthogonalization and Regression*

- 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*

Initial CRAN release