calling a GUI function inside a IF statement

i have to call a function when the if statement s satisfied. but when i call a function inside the function it shows a error underscore stating that "FUNCTION keyword use is invalid here.this will cause later message about error"

if passx  == [0; 0; 0; 0]
  if passy  == [0; 0; 0; 0]
      %function xxxx
  else
      disp('no name')
  end
end

So experts pl help me out.

Answer 1

[Azzi Abdelmalek]

Use

if isequal(passx ,[0; 0; 0; 0])

Post the function that causes an error and how did you call it?