dim_coord_barcode: Find rownames of cells from coordinates of dimensionality...
In jacobheng/cellwrangler: Supplemental toolkit for single-cell RNAseq analysis

dim_coord_barcode() returns the rownames of cells based on the coordiates of a dimensionality reduction projection (e.g. t-SNE, UMAP).

1	dim_coord_barcode(dim_proj, x1, x2, y1, y2)

`x1`	lower limit of x-coordinates
`x2`	higher limit of x-coordinates
`y1`	lower limit of y-coordinates
`y2`	higher limit of y-coordinates
`dim_reduction`	a dataframe specifying the coordinates of a dimensionality reduction output (e.g. t-SNE, UMAP etc.). Each column should specify one dimension. Rownames should correspond to some of identifier for cells (e.g. barcode).