Nucleotide statistics for fasta sequences

Question

[l.souza]

I have a FASTA file with 200 sequences, and I would like to know the average of nucleotides. How can I get it?

[GenoMax]

I edited the title to be consistent with the question.

Answer 1

[Pierre Lindenbaum]

awk '/^>/ {N++;next;} {B+=length($0);} END {printf("%f\n",B/N);}' input.fasta

[l.souza]

Thank you, Pierre Lindenbaum!

Answer 2

[cpad0112]

seqkit stats input.fasta

Look at avg.len field and link to seqkit: http://bioinf.shenwei.me/seqkit/download/