Maximum absolute value in array

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Serina Robbins
Serina Robbins 2021-3-23
编辑： Jan 2021-3-23
I have a formula carry out a calculation that gives me positive and negative numbers (which is is supposed to) that correspond to an alpha angle. How can I find the maximum asbsolute value and find its corresponding alpha?
My code it
By = round((Ey-(FGH.*sind(gamma))),5);
Bymax = max(abs(By))
indexes = find(By == Bymax);
angleBy = alpha(indexes)
Where my Bymax is originally negative but the abs turns it positive. Now I need to find teh corresponding alpha to the Bymax.
It gives me:
angleBy =
1×0 empty double row vector
I tried with another force I have that the magnitude is already a positive number.. the code looks like:
Bz = Ez+(FGH.*cosd(gamma));
Bzmax = max(abs(Bz))
indexes = find(Bz == Bzmax);
angleBz = alpha(indexes)
And that gives me:
Bzmax =
3801.5
angleBz =
8.686
Which is what I want.
What am I doing wrong?

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回答（1 个）

Jan
Jan 2021-3-23
编辑：Jan 2021-3-23
Use the 2nd output of the max() command:
[Bymax, index] = max(abs(By))
By(index)

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