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How do I find the associated x index for a max y value?

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Matt Rulli
Matt Rulli 2018-4-4
评论： Matt Rulli 2018-4-4
I'm working with a graph that compares load resistance values against power supplied, and I have the max y-value, but I need to find the corresponding x index so I can mark the high point of the graph.
Identifies the max y value: [P_max, index] = max(P); Need to find the corresponding x index so I can plot the max point: [???????] = ???(?) ?

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KSSV
KSSV 2018-4-4
[P_max, index] = max(P)
iwant = yourvariable(index)

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