I have rewritten analyze_vals so it now works in a more logical way and interfaces nicely with write_tab in pretty print mode.
read_fastq -i test.fq | trim_seq | analyze_vals | write_tab -cpx
+----------+------------+-------+-----+-----+-----+------+
| KEY | TYPE | COUNT | MIN | MAX | SUM | MEAN |
+----------+------------+-------+-----+-----+-----+------+
| SEQ_NAME | Alphabetic | 3 | 42 | 42 | 126 | 42.0 |
| SEQ | Alphabetic | 3 | 77 | 118 | 272 | 90.7 |
| SEQ_LEN | Numeric | 3 | 77 | 118 | 272 | 90.7 |
| SCORES | Alphabetic | 3 | 77 | 118 | 272 | 90.7 |
+----------+------------+-------+-----+-----+-----+------+