Sequence Statistics
seq_statsCompute sequence length, mono/dinucleotide composition, and GC skew for DNA or RNA sequences to assess nucleotide characteristics.
Instructions
Compute sequence length, mono/dinucleotide composition, and GC skew.
Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| sequence | Yes | Nucleotide sequence (DNA or RNA; case-insensitive). IUPAC ambiguity codes (R, Y, S, W, K, M, B, D, H, V, N) are accepted where documented. |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| length | Yes | Sequence length in nucleotides. | |
| gc_skew | Yes | GC skew = (G - C) / (G + C); 0.0 when G + C == 0. | |
| composition | Yes | Mononucleotide counts keyed by base. | |
| dinucleotides | Yes | Overlapping dinucleotide counts keyed by pair. |