More non-singleton rhs dimensions than non-singleton

Question

Philosophaie 2013-6-28

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/80584-more-non-singleton-rhs-dimensions-than-non-singleton

??? Assignment has more non-singleton rhs dimensions than non-singleton subscripts.

Error in ==> EigenValuesVectors4x4ToTensor at 16

            f(i,k,r)=(T(i,k)-L(r)*I)*A(r,k)
I=[1 0 0 0;0 1 0 0;0 0 1 0;0 0 0 1]
T=[T11 T12 T13 T14; T21 T22 T23 T24; T31 T32 T33 T34; T41 T42 T43 T44]
A=[A11 A12 A13 A14; A21 A22 A23 A24; A31 A32 A33 A34; A41 A42 A43 A44]
L=[L1; L2; L3; L4]
f=(zeros(4,4,4))
for r=1:4
    for k=1:4
        for i=1:4
            f(i,k,r)=(T(i,k)-L(r)*I)*A(r,k)
        end
    end
end

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Jan 2013-6-28

What is "I"?

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Answer 1

Walter Roberson 2013-6-28

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https://ww2.mathworks.cn/matlabcentral/answers/80584-more-non-singleton-rhs-dimensions-than-non-singleton#answer_90275

Your "I" is an array, so L(r)*I is an array, and (T(i,k)-L(r)*I) is too, and so (T(i,k)-L(r)*I)*A(r,k) is going to be an array. You are trying to store that entire array into the single location f(i,k,r)

Perhaps you should be indexing "I" as well.