Mat@data treat data as a matrix.
Mat@"Column"@data treat data as a column matrix.
Mat@"Row"@data treat data as a row matrix.
Mat[data,patt] suppose every element in data matches patt.
MatQ[expr,patt] check whether expr is a correct Mat type matrix with pattern constraint patt.
MatQ[patt] represents an operator form of MatQ that can be applied to an expression.
MatData[mat] get raw data of Mat type matrix.
MatPatternConstraint[mat] get pattern constraint of mat.
MatrixFunctor[f] give the matrix form of a scaler function f.