nx: Calcuration of NX and LX from genome sequence.
In shkonishi/rskoseq: This is my personal package of R functions for NGS data

Calculation of NX and LX from genomic sequence in fasta format. If the genomic sequence is pseudo chromosomes, L50 is no needed.

1	nx(in_f, genome, asmbl)

`in_f`	The input file path with fasta format, or DNAStringSet object from Biostrings package.
`genome`	numeric: genome size. The default is NULL. The genome size is calculated from the sum of the widths of the input fasta files.
`asmbl`	character: assembly name. The N50 is compared to the previous assembly.

## Not run: 
fas <- "~/db/genome/CHOK1GS_HDv1/CHOK1GS_HDv1.dna.toplevel.fa.gz"
nxdat <- rskoseq::nx(in_f = fas, asmbl = "CHOK1GS_HDv1")
plot(x = nxdat$NGX, y = nxdat$Mbp, xlab = "NX", ylab = "contig length(Mbp)")
abline(v = 50, lty = 3)

## End(Not run)