usage: micca stats [-h] -i FILE [-o DIR] [-n TOPN]

micca stats reports statistics on reads in a FASTQ file. micca stats
returns in the output directory 3 tab-delimited text files:

* stats_lendist.txt: length distribution;
* stats_qualdist.txt: Q score distribution;
* stats_qualsumm.txt: quality summary. For each read position, the
following statistics are reported:
- L: read position;
- NPctCum: percent of reads with at least L bases;
- QAv: average Q score at position L;
- EERatePctAv: average expected error (EE) rate %.

Moreover, micca stats returns the respective plots in PNG format,
stats_lendist_plot.png, stats_qualdist_plot.png, and

optional arguments:
-h, --help            show this help message and exit

-i FILE, --input FILE
                        input FASTQ file, Sanger/Illumina 1.8+ format
                        (phred+33) (required).
-o DIR, --output DIR  output directory (default .).
-n TOPN, --topn TOPN  perform statistics only on the first TOPN sequences
                        (disabled by default).


Compute statistics on the top 10000 sequences of input.fastq:

    micca stats -i input.fastq -o stats -n 10000