What is a "square window function"? When I read previous studies it mentioned a method of "square windowing function". I searched but I did not find anything talking about it. Can someone help to explain what is "square windowing function"? How to do it in matlab?

The description in the article is like this:


  A Cooley-Tukey FFT algorithm was implemented with a square
  windowing function and a 50% overlap of data segments to reduce
  spectral variance (Press et al., 1989).


This is from:


  Hamill et al., 1995. Shock attenuation and stride frequency during
  running. Human Movement Science. 14, 45-60.
A square window seems to be another name for a rectangular window.  A rectangular window is the default window used to apply an FFT to a subset of a longer stream of data and without any additional scaling or weighting of any of the subset's samples.