image_resid¶
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sherpa.astro.ui.image_resid(id=None, newframe=False, tile=False)¶ Display the residuals (data - model) for a data set in the image viewer.
This function displays the residuals (data - model) for a data set.
The image viewer is automatically started if it is not already open.
Parameters: - id (int or str, optional) – The data set. If not given then the default identifier is used, as returned by get_default_id.
- newframe (bool, optional) – Create a new frame for the data? If
False, the default, then the data will be displayed in the current frame. - tile (bool, optional) – Should the frames be tiles? If
False, the default, then only a single frame is displayed.
Raises: sherpa.utils.err.IdentifierErr– If the data set does not exist or a source expression has not been set.See also
get_resid_image()- Return the data used by image_resid.
image_close()- Close the image viewer.
image_data()- Display a data set in the image viewer.
image_fit()- Display the data, model, and residuals for a data set in the image viewer.
image_model()- Display the model for a data set in the image viewer.
image_open()- Open the image viewer.
image_ratio()- Display the ratio (data/model) for a data set in the image viewer.
image_source()- Display the model for a data set in the image viewer.
Notes
Image visualization is optional, and provided by the DS9 application [1].
References
[1] http://ds9.si.edu/site/Home.html Examples
Display the residuals for the default data set.
>>> image_resid()
Display the residuals for data set 2 in a new frame so that the data in the current frame is not destroyed. The new data will be displayed in a single frame (i.e. the only data shown by the viewer).
>>> image_resid(2, newframe=True)
Display the residuals for data sets ‘i1’ and ‘i2’ side by side:
>>> image_resid('i1') >>> image_resid('i2', newframe=True, tile=True)