The trace of a matrix is defined as the sum of diagonal elements, which of the following methods can find the matrix trace( ).
A: trace(A)
B: sum(diag(A))
C: prod(eig(A))
D: sum(eig(A))
A: trace(A)
B: sum(diag(A))
C: prod(eig(A))
D: sum(eig(A))
举一反三
- 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
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- Which of the following kdb commands is used to obtain a stack trace from a dump? （） A: trb B: his C: f D: trace