I am using the segment function of DNAcopy via conumee for copy number variation analysis. I wonder what NAs in the b-stat and p-val columns mean. For example:

    > ID    chrom   loc.start   loc.end num.mark    seg.mean    bstat   pval    lcl ucl
    > Sample.1  chr2    32288900    200320591   220 0.0049  NA  NA  NA  NA
    > Sample.1  chr22   51113475    51154096    19  0.0217  5.13427042369266    5.31224265912416e-06    51143391    51158892

Another question asked about when almost all rows have NAs, but I only mean some rows. Should these rows be ignored or not?