Returns N50 (or N of your choice) and other stats of a fasta/fastq file (can be gzipped) of sequences. N50 is calculated as the sequence length above which 50% of the total sequence length lies when the sequences are sorted in order of descending length.
Requires Numpy for calculating the median read length.
python fast_stats.py -i <infile> -n 50
-iThe fasta/q file (can be gzipped) for which you want to calculate the stats.
-nThe value of n (usually 50) that you want to use.
-hDisplays help.