Local Maxima finder

This function gives the local maxima of the input signal: x.

Description

The function is very easy to be used. One tunable parameter allows it to be adapted to very different applications.
It should work with any Matlab version.

• MATLAB release: MATLAB 7.5 (R2007b)

[Rody Oldenhuis]

It looks like you forgot an "any":

"if x(n) > [x(minimo_ind:n-1) x(n+1:massimo_ind)]"

should be
  
"if any( x(n) > [x(minimo_ind:n-1) x(n+1:massimo_ind)] )"

Also, you could better use the construction

M = NaN(size(x));
for (...)
  ...
  if any(...)
      M(n) = x(n);
  end
end
M = M(~isnan(M));

which, despite the extra initializations and deletions should be faster (and safer) for long [x] or small [punti], or [x] with lots of local maxima.