get_model_image¶
- sherpa.astro.ui.get_model_image(id=None)¶
Return the data used by image_model.
Evaluate the source expression for the image pixels - including any PSF convolution defined by set_psf - and return the results.
- Parameters
id (int or str, optional) – The data set. If not given then the default identifier is used, as returned by get_default_id.
- Returns
src_img – The
y
attribute contains the source model values as a 2D NumPy array.- Return type
a sherpa.image.ModelImage instance
- Raises
sherpa.utils.err.IdentifierErr – If the data set does not exist or a source expression has not been set.
See also
get_source_image
Return the data used by image_source.
contour_model
Contour the values of the model, including any PSF.
image_model
Display the model for a data set in the image viewer.
set_psf
Add a PSF model to a data set.
Examples
Calculate the residuals (data - model) for the default data set:
>>> minfo = get_model_image() >>> dinfo = get_data_image() >>> resid = dinfo.y - minfo.y