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All versions of Octave include a number of built-in data types, including real and complex scalars and matrices, character strings, a data structure type, and an array that can contain all data types.
It is also possible to define new specialized data types by writing a small amount of C++ code. On some systems, new data types can be loaded dynamically while Octave is running, so it is not necessary to recompile all of Octave just to add a new type. See section Dynamically Linked Functions, for more information about Octave's dynamic linking capabilities. User-defined Data Types describes what you must do to define a new data type for Octave.
Return the type of the expression expr, as a string. If EXPR is omitted, return an array of strings containing all the currently installed data types.
|3.1 Built-in Data Types|
|3.2 User-defined Data Types|
|3.3 Object Sizes|
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