Nice way, thx. paull
W dniu niedziela, 16 sierpnia 2015 18:25:02 UTC+2 użytkownik Tim Holy napisał: > > If you want a running density, look into > c = cumsum(v) > density = c[6:end] - c[1:end-5] > > If you want in blocks, reshape to a matrix and take the mean along > dimension > 1. > > --Tim > > On Sunday, August 16, 2015 09:08:23 AM paul analyst wrote: > > Hi, > > How quickly computethe density of the vector in the selected range? > > I have vec=[0 0 0 1 0 1 0 1 1 0] > > I am lookking for function computing "density" of this vector on > selelcted > > range i.e. 5 elements : > > > > foo(vec,5) > > result: > > [0.2 0.2 0.2 0.2 0.2 0.6 0.6 0.6 0.6 0.6] > > > > mean first 5 elements is 0.2 > > > > mean second 5 elements is 0.6 > > > > etc... > > I need somthing fast to veeeery long vectors > > Paul > >
