cat melissa_blue_21Nov2017_GLtS4.fasta | awk '$0 ~ ">" {print c; c=0;printf substr($0,2,100) "\t"; } $0 !~ ">" {c+=length($0);} END { print c; }' > scaffold_lengths.txt
LG scaf length
1 1628 23101924
10 1639 18505018
11 4 18437071
12 833 16513945
13 1632 18939161
14 1644 15445375
15 1640 15005121
16 503 18388014
17 309 14580232
18 1647 16066785
19 1638 15840280
2 11 13701709
20 588 13470706
21 1095 13405876
22 1627 12081197
3 1646 12391366
4 1648 12399322
5 1636 11419948
6 228 12400032
7 1642 12452079
8 1645 9353241
9 1641 6908081
Z 1631 21870511
NA 942.307692307692 NA
Stats for cline X chromosomes