# Tools: `tl`

Functions for computing mutation spectra, calculating rates, and identifying mutation patterns.

## Mutation spectra

```{eval-rst}
.. module:: cellspec.tl
.. currentmodule:: cellspec

.. autosummary::
    :toctree: ../generated

    tl.compute_spectrum
    tl.compute_spectrum_from_mask
    tl.normalize_spectrum
```

## Normalization

```{eval-rst}
.. autosummary::
    :toctree: ../generated

    tl.compute_callable_sites
```

## Pattern identification

```{eval-rst}
.. autosummary::
    :toctree: ../generated

    tl.private_mutations
```