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

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

[Stephen23]

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]

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

Answer 1

[James Tursa]

Does this do what you want?

if( isempty(s) )

[Guillaume]

The brackets around isempty are completely unnecessary. A hold over from C?

[James Tursa]

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.

[pamela sulis]

I use if( isempty(s) ) and i solve the problem! Thanks