After excuting the statement "[X,D]=eig(A)", D is（ ）. A: a scalar matrix B: an identity matrix C: a triangular matrix D: a diagonal matrix

If A is a matrix, the function max(A(:)) is ( ). A: to return the first element B: to return the maximum element in each row of the matrix C: to return the maximum element in each column of the matrix D: to return the largest element of the entire matrix

14 In triple sequence table of sparse matrix, each triple represents ( ). A: the row number,column number and data value of non-zero elements in the matrix B: the data value of non-zero elements in the matrix C: the row and column numbers of elements in the matrix D: the row number,column number and data value of elements in the matrix

Let A be a 4 by 3 matrix, and r(A)=2, and B is an invertible matrix, then r(AB)=______

If A is a matrix, the function of the function max(a(:)) is ( ). A: to work out the maximum element of the entire matrix B: function call errors C: to work out the maximum element of each row of the matrix D: to work out the maximum element of each column of the matrix

Extracellular matrix]

R语言中，函数matrix()和Matrix()是两个相同的函数

下面语句中错误的是 ( ) A．ReDim Preserve Matrix(10, UBound(Matrix, 2)+1) B．ReDim Preserve Matrix(UBound(Matrix, 1)-4-1, 10) C．ReDim Preserve DynArray(UBound(DynArray)+1) D．ReDim DynArray(UBound(DynArray)+1)

For a MDOF system, which one is needed to calculate its vibration frequencies? A: the mass matrix [M] B: the damping matrix [C] C: the stiffness matrix [K] D: the vibration modes

MATLAB是()的缩写 A: MATrix LABoraty B: MATrex LABoratoy C: MATrix LABoratoy D: MATrax LABoratoy