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I think this is a documentation error
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If I search the help for "array vs matrix", the 7th and 8th entries are rdivide and ldivide. I don't see a Quote button, so I'll post what I see there in a code block:
rdivide, ./ - Right array division
This MATLAB function divides each element of A by the corresponding element of B.
Documentation > MATLAB > Language Fundamentals > Operators and Elementary Operations > Arithmetic Operations
ldivide, .\ - Left array division
This MATLAB function divides each element of A by the corresponding element of B.
Documentation > MATLAB > Language Fundamentals > Operators and Elementary Operations > Arithmetic Operations
It seems to me that the secobd line under ldivide should be:
This MATLAB function divides each element of B by the corresponding element of A.
No? Shouldn't the A and B be reversed?
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per isakson
2020년 4월 6일
편집: per isakson
2020년 4월 6일
Yes, it looks so, but in the description of ldivide the positions of A and B are switched. "x = B.\A divides each element of A by the corresponding element of B." Seems as if the search function replaces the formula by "This function". First of April was a week ago:)
답변 (1개)
Walter Roberson
2020년 4월 6일
No, ldivide says
B.\A divides each element of A by the corresponding element of B
whereas ldivide says
A./B divides each element of A by the corresponding element of B.
Notice that the order of A and B are reversed between the two of them.
>> [3 5].\[2 4]
ans =
0.666666666666667 0.8
And we see that the 2 from A (the second operand) was indeed divided by the 3 from B (the first operand)
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