Develop a reordering matrix based on stored vectors

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Aaron DeSantis
Aaron DeSantis 2023-2-23
回答： Voss 2023-2-23
I would like to make a reordering matrix to remap values in a matrix. This is a tool used in the determination of gobal stiffness matrices for trusses, beams, frames, etc. We start with two vectors defined as order_old and order_new.
order_old = [1 2 3 4 5 6];
order_new = [4 5 1 2 3 6];
Then arrange them along side a blank 6x6 matrix placing 1's where indecies match and 0's where they do not. See the image below for clarification.
This matrix will then be used to reorder a stiffness matrix in one corrderinate system (old order) to the new coordinate system (new order). Is there a way to make the matrix "output" as shown in the figure above in matlab?

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Voss
Voss 2023-2-23
order_old = [1 2 3 4 5 6];
order_new = [4 5 1 2 3 6];
Output = order_old.' == order_new

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