Global matrix typedefs

Eigen defines several typedef shortcuts for most common matrix and vector types.

Eigen defines several typedef shortcuts for most common matrix and vector types.

The general patterns are the following:

MatrixSizeType where Size can be 2,3,4 for fixed size square matrices or X for dynamic size, and where Type can be i for integer, f for float, d for double, cf for complex float, cd for complex double.

For example, Matrix3d is a fixed-size 3x3 matrix type of doubles, and MatrixXf is a dynamic-size matrix of floats.

There are also VectorSizeType and RowVectorSizeType which are self-explanatory. For example, Vector4cf is a fixed-size vector of 4 complex floats.

With \cpp11, template alias are also defined for common sizes. They follow the same pattern as above except that the scalar type suffix is replaced by a template parameter, i.e.:

• MatrixSize<Type> where Size can be 2,3,4 for fixed size square matrices or X for dynamic size.
• MatrixXSize<Type> and MatrixSizeX<Type> where Size can be 2,3,4 for hybrid dynamic/fixed matrices.
• VectorSize<Type> and RowVectorSize<Type> for column and row vectors.

With \cpp11, you can also use fully generic column and row vector types: Vector<Type,Size> and RowVector<Type,Size>.

See also

class Matrix