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Create Array Map or get all indices of the given 2D matrix

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Aravin
Aravin 2018-4-14
编辑： Jan 2018-4-14
Hi everyone,
Let say I have two array a and b. Let a = [1 2 3], b = [4 5 6]; I want to get C= [1 1 1 2 2 2 3 3 3 4 4 4;4 5 6 4 5 6 4 5 6].
In short, I want indices of given 2D matrix.
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Jan
Jan 2018-4-14
编辑：Jan 2018-4-14
Your C has 12 elements in the first row and 9 in the 2nd. This means, that it is not a valid matrix at all. In addition it is not clear, what "indices of given 2D matrix" means.
Please explain the relation between the inputs and outputs and post a valid example of the output.
It is not clear, why you set the tag "crossproduct".
Is this a homework question?

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