Search for the specified CHROM-POS range and returns the first occurrence of rsID in the VR file.

FindVrChromposRange(chrom, pos_min, pos_max, first = 0,
  last = vk.env$vkrs_$NROWS, mc = vk.env$vkrs_$MC)

Arguments

chrom	Chromosome encoded number.
pos_min	Start reference position, with the first base having position 0.
pos_max	End reference position, with the first base having position 0.
first	First element of the range to search (min value = 0).
last	Element (up to but not including) where to end the search (max value = nitems).
mc	Memory-mapped columns object as retured by MmapVKRSfile.