- Minor Change: Changed lazy data to FALSE to remove notes on CRAN check.

- New
`vech()`

function: performs half-vectorization on a symmetric matrix. This is the vector-form of the lower triangular matrix only. Unlike other functions on CRAN, vech() inherits any names from the matrix. `dmatrixnorm`

: Clarified by replacing the name of argument`use.log`

with`log`

for consistency in argument name with mvtnorm and stats package.`is.symmetric()`

,`is.positive.definite()`

,`is.positive.semi.definite()`

:- if A is not symmetric, these functions NOW return FALSE instead of stopping the function. Restructured helper
`find.eval()`

.

- if A contains a missing value (
`NA`

), these functions NOW return NA.

- if A is not symmetric, these functions NOW return FALSE instead of stopping the function. Restructured helper
`rmatrixnorm`

: Added the first argument`s`

to draw many random samples. Only 1 sample is still drawn; the argument currently has no effect but acts as a placeholder in future releases.- Clarified documentation.
- Added session information and version details to the vignette. The updated versions of the packages listed do not affect the conclusions.

- The documentation is clarified.
- Submitted to CRAN but failed to be released.

- Vignette is added, replacing the package R file. Included the use and uniqueness of matrixNormal distribution. Also included an example that uses the package. Added additional packages to be imported in Documentation.
- Documentation clarified.
- Minor Changes in Examples: ** Changed order of examples in rmatnorm() for reproducibility ** Made clearer in using the dataset package in pmatnorm() example ** Removed installation of matrixcalc package in is.symmetric.matrix examples.
`is.positive.definite()`

,`is.positive.semi.definite()`

returns NA if the matrix contains missing value (bug fix).`pmatnorm()`

,`dmatnorm()`

,`rmatnorm()`

now throws error if the parameters of the matrix Normal Distribution`M`

,`U`

, or`V`

contain any missing values.`rmatnorm()`

now returns a matrix with rownames from U and the colnames from V.- In
`rmatnorm()`

,`pre0.9_9994`

that was passed from`rmvnorm()`

function in**mvtnorm library**is removed, because it is not needed. This argument was introduced in mvtnorm library to fix a bug in version 0.9-9993, but matrixNormal uses a version of at least 1.0.8. This argument is just not needed, and if pre0.9_9994 is set to TRUE, nothing will happen.

- This is a new submission.
- Added a
`NEWS.md`

file to track changes to the package. - First Release of the Package
- Successfully passed windows check.