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Simple calculations?

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Lizan
Lizan 2011-5-20
评论： Steven Lord 2020-9-6
I would like to find dn1/dn2 in matlab and I have two vectors n1 and n2.
How can I find dn1/dn2 the simplest way? Are there any inbuilt functions for these kind of calculations?

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采纳的回答

Andy
Andy 2011-5-20
Perhaps you're looking for
res = diff(n1)./diff(n2); %?
  1 个评论
Lizan
Lizan 2011-5-20
Yes, the function diff works since DIFF(X), for a vector X, is [X(2)-X(1) X(3)-X(2) ... X(n)-X(n-1)].
Many thanks!
I knew it was simple.

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更多回答（3 个）

Jan
Jan 2011-5-20
Do you want to calculate the derivative of one vector according to the other? Do you expect the result to be a matrix? Or are you looking for the GRADIENT command?
Adetunji
Adetunji 2012-1-19
x =90 91 92 93 94 95 96 97 98 99 100 y=54 55 54 54 57 57 63 56 57 56 56
am trying to compute the gradient of the above in matlab..any idea?
Jackelin Estrada
Jackelin Estrada 2020-9-5
D= 9 6/12 + 7×5^3+2
  2 个评论
Steven Lord
Steven Lord 2020-9-6
It's not clear to me how this relates to the original question. Please post this (with a lot more information about what you're trying to do) as its own question, not as an answer on an existing question.

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