File: fftshift.sci

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function x = fftshift(x,job)
  if argn(2)<2 then job='all',end
  deff('sel=fun(sk)','c=ceil(sk/2);sel=[c+1:sk,1:c]')
  if job=='r' then job=1,elseif job=='c' then job='2',end
  ind=list()
  if job=='all' then
    for sk=size(x),ind($+1)=fun(sk),end
  else
    for sk=size(x),ind($+1)=:,end;
    ind(job)=fun(size(x,job))
  end
  x=x(ind(:))
endfunction