Convert 0×1 empty double column vector to zero

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.

[James Tursa]

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?

[Corinna]

just use sum(0×1 empty double column vector)

the result is 0

Answer 1

[James Tursa]

Is this construct all you need?

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

[Zeynab Mousavikhamene]

Thanks. I have a lot of if in the code. Any other option? preferred to be one command

[Steven Lord]

Write a small function.

function x = replaceWith0IfEmpty(x)
if isempty(x)
    x = 0;
end
end

Call that function where you want to replace empty matrices with 0.

y = replaceWith0IfEmpty(y);

[James Tursa]

@Zeynab: Again, we need more details. Can you modify the function/calculation that is producing these empty variables?

[Zeynab Mousavikhamene]

@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.

[James Tursa]

What is the calculation you are doing that is producing the empty variable?