33.12. Matlab Interface
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## 33.12. Matlab Interface

This is an interface to the Matlab C API. The package “MATLAB” is case-sensitive, so you would write `(matlab:engOpen ...)` when you need to call `engOpen`.

When this module is present, `*FEATURES*` contains the symbol `:MATLAB`.

Additionally, some higher level functionality is available (see `modules/matlab/test.tst` for sample usage):

`(matlab:matfile-content mf)`
  Return a `VECTOR` of `STRING`s naming the variables in file `mf` (opened using `matOpen`).
`matlab:*command*`
  The default argument to `engOpen`.
`matlab:*engine*`
  The currrently open Matlab engine.
`(matlab:engine)`
  Make sure `*engine*` is valid and return it.
`(matlab:with-engine (`&OPTIONAL` engine command) `&BODY` `body`)`
  Run the `body` wuth the `engine` bound to a Matlab engine (default `*engine*`). The engine is opened with `engOpen`, then closed with `engClose`.
`(matlab:with-MATfile (file name `&OPTIONAL` mode) `&BODY` `body`)`
  `matOpen` the matlab file, do the `body`, `matClose` it.
`(matlab:copy-lisp-to-mxArray lisp-array `&OPTIONAL` matlab-matrix)`
  Copy data from the 2-dimensional lisp array to the Matlab matrix.
`(matlab:copy-lisp-to-matlab lisp-array matlab-variable `&KEY` engine)`
  Copy the 2-dimensional lisp array to the Matlab variable (a `STRING`) in the supplied engine (defaults to `*engine*`).
`(matlab:copy-mxArray-to-lisp matlab-matrix `&OPTIONAL` lisp-array)`
  Copy the matlab matrix to the 2-dimensional lisp array (created anew or re-used if supplied).
`(matlab:copy-matlab-to-lisp matlab-variable `&OPTIONAL` lisp-array `&KEY` engine)`
  Copy data from the matlab variable to the 2-dimensional lisp array (created anew or re-used if supplied).
`(matlab:invert-matrix lisp-array `&KEY` engine)`
  Invert the lisp matrix using the specified engine.

| These notes document CLISP version 2.45 | Last modified: 2008-05-14

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