listNodes: Select nodes and edges
In xzheng-ac/scPADGRN: A PADMM approach for reconstructing DGRN using scRNA-seq

This function selects nodes and edges from a list of gene regulatory networks

1	listNodes(A, edgeRank, nodeRank)

`A`	A is dynamic gene regulatory network, a list of numerical matrix.
`edgeRank`	edgeRank is the edges number of a matrix.
`nodeRank`	nodeRank is the nodes number of a matrix.

##---- Should be DIRECTLY executable !! ----
##-- ==>  Define data, use random,
##--	or do  help(data=index)  for the standard data sets.

## The function is currently defined as
function (A, edgeRank, nodeRank)
{
    listNode <- list()
    length(listNode) <- length(A)
    for (i in c(1:length(A))) {
        listNode[[i]] <- matrixNodes(A[[i]], edgeRank, nodeRank)
    }
    return(listNode)
  }