How can i remove one element from this matrix

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Hussein Qenawy
Hussein Qenawy 2019-4-7
编辑： Hussein Qenawy 2019-4-7
D= [2 0 0 0 1; 2 2 0 0 1; 0 0 2 0 1; 0 0 0 2 1; 0 0 0 0 3] How can I remove this element (2,1)
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madhan ravi
madhan ravi 2019-4-7
编辑：madhan ravi 2019-4-7
In the question you asked second row has 4 elements while the rest has 5 elements, algebra??
You can't have hole in a matrix so replacing is an option:
D(2,1) = Nan % replace it with NaN or zero for example

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