Undefined function 'eq' for input arguments of type 'struct'

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pamela sulis
pamela sulis 2015-10-27
编辑： pamela sulis 2015-10-28
Hi! I create this code in which s is a struct
if(s(1,1)==[])
i=i+1;
end
I have an error: 'Undefined function 'eq' for input arguments of type 'struct', I don't understand the error's meaning. Someone can help me, thanks
  2 个评论
Stephen23
Stephen23 2015-10-27
Do you want to test if the structure is empty?
If s is a structure, then s(1,1) will also be a structure, which clearly is not a number and so does not make sense to check if it equals something else.
pamela sulis
pamela sulis 2015-10-28
编辑：pamela sulis 2015-10-28
yes, i want to test if the structure is empty... I try if(isempty(s)) instead of if(s(1,1)==[]) and i solve my problem! Thanks

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James Tursa
James Tursa 2015-10-27
Does this do what you want?
if( isempty(s) )
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James Tursa
James Tursa 2015-10-27
编辑：James Tursa 2015-10-27
I know. It is for readability ... at least to my eyes. Could be as you surmise, because it looks more like C or Fortran, so my brain doesn't have to think as much in determining what is on the line.

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