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How to create matrix with array under certain conditions?

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Yun Inn 2013-5-3

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I have an array:

A=[1.3 1.2 1.3]

How can I get matrix B using A?

B=[1.3 1.3 1.3; 1.3 1.2 1.3; 1.3 1.3 1.3]

Matrix B has the value of A at the central row,column,and diagonal.

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José-Luis 2013-5-3

You mean two diagonals? Otherwise two of the values of the resulting matrix are undefined.

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Chandrasekhar 2013-5-3

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B = [ones(1,3)*A(1); A; ones(1,3)*A(1)]

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