CallbackShow

class odl.solvers.util.callback.CallbackShow(title=None, step=1, saveto=None, **kwargs)

Bases: Callback

Callback for showing iterates.

See also

odl.discr.discr_space.DiscretizedSpaceElement.show

odl.space.base_tensors.Tensor.show

Methods

__call__(x)	Show the current iterate.
reset()	Set iter to 0 and create a new figure.

__init__(title=None, step=1, saveto=None, **kwargs)

Initialize a new instance.

Additional parameters are passed through to the show method.

Parameters:

titlestr, optional

Format string for the title of the displayed figure. The title name is generated as

title = title.format(cur_iter_num)

where cur_iter_num is the current iteration number. For the default None, the title format 'Iterate {}' is used.

steppositive int, optional

Number of iterations between plots.

savetostr or callable, optional

Format string for the name of the file(s) where iterates are saved.

If saveto is a string, the file name is generated as

filename = saveto.format(cur_iter_num)

where cur_iter_num is the current iteration number.

If saveto is a callable, the file name is generated as

filename = saveto(cur_iter_num)

If the directory name does not exist, a ValueError is raised. If saveto is None, the figures are not saved.

Other Parameters:

kwargs

Optional keyword arguments passed on to x.show.

Examples

Show the result of each iterate:

>>> callback = CallbackShow()

Show and save every fifth iterate in png format, overwriting the previous one:

>>> callback = CallbackShow(step=5,
...                         saveto='my_path/my_iterate.png')

Show and save each fifth iterate in png format, indexing the files with the iteration number:

>>> callback = CallbackShow(step=5,
...                         saveto='my_path/my_iterate_{}.png')

Pass additional arguments to show:

>>> callback = CallbackShow(step=5, clim=[0, 1])