Creating a symmetric matrix from a single column vector

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Ben McSeveney
Ben McSeveney 2018-2-15
回答： Star Strider 2018-2-15
How do I create a symmetric matrix from a given column vector, e.g. [1 2 3; 2 1 2; 3 2 1] from [1; 2; 3]?
I have a 84x1 column vector of data so need a quick method.

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Star Strider
Star Strider 2018-2-15
That same example is in the documentation for the toeplitz function.

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