sort_ftree: Sort the resulting file of tree
In functClust: Functional Clustering of Redundant Components of a System

Description Usage Arguments Details Value

Take a tree, group the components by cluster, and sort the clusters by increasing label. Increasing label corresponds to increasing efficiency of the clusters.

1	sort_ftree(tree, index.return = FALSE)

`tree`	a list of a matrix of component affectation and a vector of coefficients of determination.
`index.return`	a logical. If `index.return = TRUE`, `sort_ftree` only returns the sorted matrix of component affectation. If `index.return = FALSE`, `sort_ftree` returns the sorted matrix of component affectation, the sorted indices and the sorted names of components.

A hierarchical tree is recorded as a list of matrix of component affectation and a vector of coefficients of determination. The matrix of component affectation is a square matrix. Its dimension is "number of leaves" = "number of components". The clusters of components are labelled by integers, an integer by cluster. The first line of the square matrix corresponds to the trivial cluster. The trivial cluster get together all the components: all components are thus labelled by one. The second line separates the trivial cluster into 2 sub-clusters: the components are labelled 1 or 2 according to the cluster to which they belong. The following lines separate the trivial cluster into n sub-clusters, labelled from 1 to the line numero. The last line separate each component in a singleton cluster.

`index.return = TRUE`	`sort_ftree` returns the sorted matrix of component affectation.
`index.return = FALSE`	`sort_ftree` returns the sorted matrix of component affectation, the sorted indices and the sorted names of components.