distances=[100.2545 120.6632;200.8588 220.4465] points_id=[{'p1'} {'p2'};{'p3'} {'p4'}] pointfind = @(d) points_id(find(distances == d)); p = pointfind(120.6632)
%it gives
p1 = Empty cell array: 0-by-1
%this function only works with integers but I need to work with floating points number.
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