Convert an x-encoded simplex-lattice point to a u-encoded simplex-lattice point (equivalently, "untabulate" bin counts)

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`x` |
x: A numeric vector. x[i] is interpreted as the count in bin i. |

`labels` |
A vector. Interpreted as the bin labels; default value is seq(along = x), which causes return of a u-encoded simplex-lattice point. Other values of labels cause return of the result of subscripting labels with the u-encoded simplex-lattice point that would have been obtained if the default value of labels were used. |

rep(labels, x), a vector of length sum(x). If labels = seq(along = x) (the default), value is the u-encoded translation of the simplex lattice point, x. Equivalently, value gives the bin numbers, in lexicographic order, for the objects represented by the counts in x. For other values of argument "labels", value gives the bin labels for the objects represented by the counts in x (equivalent to labels[x2u(x)]).

tabulate, rep

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