Convert 0×1 empty double column vector to zero

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Zeynab Mousavikhamene 2019-8-30

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评论： James Tursa 2019-8-31

I am running a code and some of the parameters are 0×1 empty double column vector. Is there any way to convert these to zero?

I mean isntead of daying empty double, assign zero.

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James Tursa 2019-8-30

We need more details. Are you tring to change the behavior of a function or calculation that returns empty variables? Are you tring to change empty variables in the workspace to 0's? Are these empty variables part of a cell or struct array?

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James Tursa 2019-8-30

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https://ww2.mathworks.cn/matlabcentral/answers/478324-convert-0x1-empty-double-column-vector-to-zero#answer_389841

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Is this construct all you need?

if( isempty(x) )
    x = 0;
end

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Zeynab Mousavikhamene 2019-8-30

@james I am doing some calculations for example a=b+c. it is in the loop and c is changing. Sometimes c is "0×1 empty double column vector" and sometimes it is a reall number. When it is empty, I get error in a=b+c. That's why I need to make sure that if c is empty, just replace it with zero. I want to avoid using if conditional.