astro py:docs

- Index
- Modules

### Navigation

- next »
- « previous |
- Astropy v5.2.1 »
- Data Visualization (`astropy.visualization`) »
- BaseStretch

# BaseStretch

class astropy.visualization.BaseStretch

  Bases: `BaseTransform`

  Base class for the stretch classes, which, when called with an array of values in the range [0:1], return an transformed array of values, also in the range [0:1].

  Attributes Summary

  `inverse` | A stretch object that performs the inverse operation.

  Methods Summary

  `__call__`(values[, clip, out]) | Transform values using this stretch.

  Attributes Documentation

  inverse

    A stretch object that performs the inverse operation.

  Methods Documentation

  __call__(values, clip=True, out=None)

    Transform values using this stretch.

    Parameters:
      values numpy:array_like

        The input values, which should already be normalized to the [0:1] range.

      clip bool, optional

        If `True` (default), values outside the [0:1] range are clipped to the [0:1] range.

      out `ndarray`, optional

        If specified, the output values will be placed in this array (typically used for in-place calculations).

    Returns:
      result `ndarray`

        The transformed values.