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Adding matrices, resulting matrix is only a copy of one of the matrices being added
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I am attempting to add three matrices although when I do so, the resulting matrix is the same as one of the matrices being added rather than a combination of the three.
For example, if I am trying to add matrices A, B and C, when I add them, the contents of the resulting matrix are the same as A alone.
What is a possible explanation for this?
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回答 (2 件)
Wayne King
2012 年 10 月 14 日
編集済み: Wayne King
2012 年 10 月 14 日
Are these large matrices? Can you show us? Of course it is possible that
A = A+B+C
but that means that B+C must necessarily be the additive identity (matrix of zeros)
For example:
A = randi([-5 5],10,10);
B = randi([-3 3],10,10);
C = -B;
A+B+C
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Walter Roberson
2012 年 10 月 14 日
This could happen if the values in B and C were much smaller than the values in A. For example, [1] + [1e-30] + [1e-50] is going to be [1]
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