create_table: create a labeled coordinate table
In bbuchsbaum/mnitables: What the package does (short line)

create a labeled coordinate table

1 2	create_table(im, threshold = 0, local_maxima_dist = 10, statname = "zstat", allow_duplicate_labels = TRUE, ...)

`im`	a`NeuroVol` instance
`local_maxima_dist`	the distance threshold used to define local_maxima
`statname`	the name of the statistic associated with the image values
`allow_duplicate_labels`	whether to allow the same atlas label to appear more than once in the table. If `FALSE` and the same label appears twice, then only the coordinate with the highest vlaue will be retained.
`...`	extra args to pass to `conn_comp`
`a`	cluster threshold value to define the mask.