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Asked: 2026-05-29T04:00:49+00:00

I need to obtain a matrix vvT formed by a column vector v .

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I need to obtain a matrix vvT formed by a column vector v. i.e. the column vector v matrix times its transpose.

I found Mathematica doesn’t support column vector. Please help.

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  1. Editorial Team

    Does this do what you want?

    v = List /@ Range@5;
vT = Transpose[v];
vvT = v.vT;

v // MatrixForm
vT // MatrixForm
vvT // MatrixForm

    Mathematica graphics

    To get {1, 2, 3, 4, 5} into {{1}, {2}, {3}, {4}, {5}} you can use any of:

    List /@ {1, 2, 3, 4, 5}

{ {1, 2, 3, 4, 5} }\[Transpose]

Partition[{1, 2, 3, 4, 5}, 1]

    You may find one of these more convenient than the others. Usually on long lists you will find Partition to be the fastest.

    Also, your specific operation can be done in different ways:

    x = {1, 2, 3, 4, 5};

Outer[Times, x, x]

    Syntactically shortest:

    {Range@5}; %[Transpose].%

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