voronoin - is there any conection between output vertices and cells c and v and input coordinate vector?

I am using comand [c,v] = voronoin(x); first I remove all the cells c, which have at least 1 element == 1:

ind = cellfun(@(xx)all(xx~=1),c);

Afterwards, using custom cellfun I am calculateing area of each voronoi cells Ap, and indices of each voronoi cell Vp:

[Vp,Ap] = cellfun(@ voronoinVert,c,v,'UniformOutput',false);

That works fast and perfect. Finally I want to know which of my input point x is contained in each of voronoi cell c with vertices Vp. I am runing inpolygon, which is very good function, but my x vector contains on average 5e5 points. I am filtering all the points x with coordinates outside the bounding box of given voronoi cell, but still it takes 10-20 min for iteration. So, to recapitulate, is there any connection bwtween ordering of input x points to the ordering of output c and v, so I could avoid inpolygon?

thank you very much for the help,

Ina

[Matt J]

I think you mean,

     [v,c] = voronoin(x);

[topolowa]

yes, of course. I found the reason. I have few duplicated points in x. It was very unlikelly to have it, by the nature of experiment, but here it is. Thanks again for the disscussion Ina