Expanded use of .* operator

Question

Paul Mennen 2023-3-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1933550-expanded-use-of-operator

评论： Steven Lord 2023-3-22

采纳的回答： John D'Errico

When you type:

>> (1:6) .* (1:3)'

You get:

ans =

1 2 3 4 5 6

2 4 6 9 10 12

3 6 9 12 15 18

This works in recent Matlab versions going back to R2018a (which is as far back as the on-line documentation will go).

But it doesn't work in R2013b. (It gives an error which says that incorrect dimensions were used.) Does anyone have access to any of the versions between those two to help me pin down more precisely when this expanded use of the times operator was introduced?

Thanks

~Paul

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Answer 1

John D'Errico 2023-3-22

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https://ww2.mathworks.cn/matlabcentral/answers/1933550-expanded-use-of-operator#answer_1198625

编辑：John D'Errico 2023-3-22

R2016b

No need for access. That is when it appeared.

Before that, bsxfun was needed. bsxfun appeared in R2007a. Before that, we needed to use tools like repmat. And before that we used pencil and paper. Things were hard back then.