how to zero pad a matrix?

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lohith
lohith 2015-1-2
编辑： Star Strider 2015-1-2
hi,
my input matrix "x" is a 3X1 matrix.
and i'm using it in the formula
r=x^t (t is some value)
but it is asking for a square matrix or a scalar value.
so, how to convert that 3X1 matrix to 3X3 square matrix by padding zeroes.
please suggest, thanks in advance

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采纳的回答

dpb
dpb 2015-1-2
More than likely you're actually looking for the "dot" operator .^ to return the element-wise values of the vector x I'd venture...but, if you really are intent on turning into an array, simply
[x zeros(length(x),length(x)-1)]^t
is the generic expression (but I still don't think that's what you intend/want).

更多回答（1 个）

Star Strider
Star Strider 2015-1-2
编辑：Star Strider 2015-1-2
You likely need to use element-wise operations:
r=x.^t;
Note the ‘.^’ replacing ‘^’. See the documentation for Array vs. Matrix Operations for details.

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