Timothy Goldsmith

自 2016 起处于活动状态

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统计学

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the acos funtion will not accept negagive numbers (e.g. -075) . WHY?
>> x = -1:.05:1; plot(x,acos(x)) grid on Subscript indices must either be real positive integers or logicals.

7 years 前 | 1 个回答 | 0

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2x2 matrix multiplied by a 2x1 column vector gives erratic results
For example: A=[3,-2;2,-2] times v=[1;-1] works, but fails if A=[1,2;3,4]. The problem seems to be that in Matlab matrix multip...

8 years 前 | 1 个回答 | 0

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