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How to manipulate expressions structurally, not necessarily complying with the rules of algebra.

1 vote
1 answer
192 views

How can I access a variable using Position?

I want to define a vector PosVec[a, b] dependent on the variables a and b of a matrix VecMat[a, b]. I want to calculate the "positions" in VecMat[a, b] of the maximum values in VecMatQ[a, b] and store …
1 vote

How can I access a variable using Position?

Shortest way: change PosVec[a_, b_] = to PosVec[a_, b_] :=, i.e. use SetDelayed instead of Set. Longest (but cleaner I think) way: change all Set to SetDelayed, define m as a two-args function, and mo …
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