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11 identity matrix and the zero matrix.
21 Eigen offers a comma initializer syntax which allows the user to easily set all the coefficients of a matrix,
74 The Matrix and Array classes have static methods like \link DenseBase::Zero() Zero()\endlink, which can be
93 \endlink fills the matrix or array with random coefficients. The identity matrix can be obtained by calling
94 \link MatrixBase::Identity() Identity()\endlink; this method is only available for Matrix, not for Array,
95 because "identity matrix" is a linear algebra concept. The method
113 conveniently. The following example contrasts three ways to construct the matrix
126 A summary of all pre-defined matrix, vector and array objects can be found in the \ref QuickRefPage.
133 matrix or array; in fact, they return so-called \ref TopicEigenExpressionTemplates "expression objects" which
134 evaluate to a matrix or array when needed, so that this syntax does not incur any overhead.
148 The expression <tt>m + MatrixXf::Constant(3,3,1.2)</tt> constructs the 3-by-3 matrix expression with all its coefficients
152 matrix of size 2-by-3, and then multiplies this matrix on the left with
164 The \link CommaInitializer::finished() finished() \endlink method is necessary here to get the actual matrix