Searching on a vector of vector

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nedo nodo 2012-11-14

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Hi,

I have a question about searching on a vector of vector. Each element of the first vector is a vector of value. The elements of the outer vector can be duplicated. I have to find a new representation in which there are no duplicates. How can I do it in efficient way?

Example

X=[0,1,0;0,1,1;0,1,0] -> Xnew=[0,1,0;0,1,1] where the first element has value two and the second one.

Thank

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Jan 2012-11-14

编辑：Jan 2012-11-14

A "vector of vectors" is called "matrix.

To find an "efficient" method, we need to know the typical size of the problem. It matters if you want to do this millions of times for a [12 x 3] matrix, or 12 times for a [1e6 x 3] matrix.

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