Using the C++ Math Library

Syntax

The syntax of C++ places several restrictions on the MATLAB C++ Math Library. In general, these restrictions do not mean that functionality is missing from the library, but rather that you access the functionality differently than you would in MATLAB.

C++ restricts the syntax of the library in these ways:

• You cannot construct arrays with MATLAB's [ ] array construction syntax. Instead, you call a constructor of the mwArray class, an array creation function, or the vertcat() and horzcat() functions.
•     The : (colon) operator is unavailable in all of its forms. The functional equivalents colon() and ramp() replace it.
• The mathematical operators .*, .\, ./, .^ and \ are not valid C++ operators. In the MATLAB C++ Math Library, function calls access the same functionality.
•     The ' (quote) and .' (dot quote) operators are unavailable. The transpose() and ctranspose() functions replace them.
• The {} cell array indexing operator is unavailable. The mwArray::cell() performs indexing into cell arrays.
• The . operator for structure indexing is unavailable. The mwArray::field() performs indexing into structures.

Each of these differences is explained in more detail later in this chapter.

Translating from MATLAB to C++

Variable Declaration