astro py:docs

- Index
- Modules

### Navigation

- next »
- « previous |
- Astropy v5.2.1 »
- Models and Fitting (`astropy.modeling`) »
- Reference/API »
- fix_inputs

# fix_inputs

astropy.modeling.fix_inputs(modelinstance, values, bounding_boxes=None, selector_args=None)

  This function creates a compound model with one or more of the input values of the input model assigned fixed values (scalar or array).

  Parameters:
    modelinstance `Model` instance

      This is the model that one or more of the model input values will be fixed to some constant value.

    values `python:dict`

      A dictionary where the key identifies which input to fix and its value is the value to fix it at. The key may either be the name of the input or a number reflecting its order in the inputs.

  Examples

      >>> from astropy.modeling.models import Gaussian2D
      >>> g = Gaussian2D(1, 2, 3, 4, 5)
      >>> gv = fix_inputs(g, {0: 2.5})

  Results in a 1D function equivalent to Gaussian2D(1, 2, 3, 4, 5)(x=2.5, y)