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How can the following list

list = {{0.1,{l->1,n->2}},{0.12,{l->1.1,n->2.1}},{0.5,{l->0.8,n->9}}};

be first organized as

list = {{0.1,1,2},{0.12,1.1,2.1},{0.5,0.8,9}};

and then remove points that are close (by metric distance), such that the result will be

list = {{0.1,1,2},{0.5,0.8,9}};
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  • $\begingroup$ list[[All, 2]] = Values@list[[All, 2]];Partition[Flatten@list, 3] $\endgroup$ – Okkes Dulgerci Aug 24 '18 at 15:57
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Try the following with your definition of list:

flattened = MapAt[Apply[Sequence]@*Values, list, {All, 2}]

(* Out: {{0.1, 1, 2}, {0.12, 1.1, 2.1}, {0.5, 0.8, 9}} *)

Then remove "close" values; adjust the rounding threshold to suit:

filtered = DeleteDuplicatesBy[flattened, Round[Norm[#], 1] &]

(* Out: {{0.1, 1, 2}, {0.5, 0.8, 9}} *)
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