ZeroDivisionError

[lea-danics]

Dear All!
I just installed mescore and started with the notebook demo cnmfe.ipynb. I must admit, I'm a total beginner in programming in every possible aspects! :( I'm a wetlab researcher, but I would like try mesmerize to evaluate Ca imaging data.

By the following step I receive zero division error and i cannot overcome this issue:

"# input movie will be shown on left, filtered on right"
iw_gs = fpl.ImageWidget(
data=[input_movie, input_movie.copy()],
frame_apply=funcs,
names=["raw", "filtered"],
grid_plot_kwargs={"size": (1200, 600)},
cmap="gnuplot2"

The detailed error message is the following:

ZeroDivisionError Traceback (most recent call last)
Cell In[37], line 2
1 # input movie will be shown on left, filtered on right
----> 2 iw_gs = fpl.ImageWidget(
3 data=[input_movie, input_movie.copy()],
4 frame_apply=funcs,
5 names=["raw", "filtered"],
6 grid_plot_kwargs={"size": (1200, 600)},
7 cmap="gnuplot2"
8 )

File ~\anaconda3\envs\mescore\lib\site-packages\fastplotlib\widgets\image.py:561, in ImageWidget.init(self, data, dims_order, slider_dims, window_funcs, frame_apply, grid_shape, names, grid_plot_kwargs, histogram_widget, **kwargs)
557 # update the default kwargs with any user-specified kwargs
558 # user specified kwargs will overwrite the defaults
559 grid_plot_kwargs_default.update(grid_plot_kwargs)
--> 561 self._gridplot: GridPlot = GridPlot(shape=grid_shape, **grid_plot_kwargs_default)
563 for data_ix, (d, subplot) in enumerate(zip(self.data, self.gridplot)):
564 if self._names is not None:

File ~\anaconda3\envs\mescore\lib\site-packages\fastplotlib\layouts_gridplot.py:93, in GridPlot.init(self, shape, cameras, controller_types, controller_ids, canvas, renderer, size, names)
90 else:
91 self.names = None
---> 93 canvas, renderer = make_canvas_and_renderer(canvas, renderer)
95 if isinstance(cameras, str):
96 # create the array representing the views for each subplot in the grid
97 cameras = np.array([cameras] * self.shape[0] * self.shape[1]).reshape(
98 self.shape
99 )

File ~\anaconda3\envs\mescore\lib\site-packages\fastplotlib\layouts_utils.py:89, in make_canvas_and_renderer(canvas, renderer)
83 raise ValueError(
84 f"canvas option must either be a valid WgpuCanvas implementation, a pygfx Texture"
85 f" or a str from the following options: {CANVAS_OPTIONS}"
86 )
88 if renderer is None:
---> 89 renderer = WgpuRenderer(canvas)
91 return canvas, renderer

File ~\anaconda3\envs\mescore\lib\site-packages\pygfx\renderers\wgpu_renderer.py:136, in WgpuRenderer.init(self, target, pixel_ratio, pixel_filter, show_fps, blend_mode, sort_objects, enable_events, gamma_correction, *args, **kwargs)
132 raise TypeError(
133 f"Render target must be a Canvas or Texture, not a {target.class.name}"
134 )
135 self._target = target
--> 136 self.pixel_ratio = pixel_ratio
137 self.pixel_filter = pixel_filter
139 # Make sure we have a shared object (the first renderer creates the instance)

File ~\anaconda3\envs\mescore\lib\site-packages\pygfx\renderers\wgpu_renderer.py:234, in WgpuRenderer.pixel_ratio(self, value)
232 target_lsize = self.logical_size
233 # Determine target ratio
--> 234 target_ratio = target_psize[0] / target_lsize[0]
235 # Use 2 on non-hidpi displays. On hidpi displays follow target.
236 self._pixel_ratio = float(target_ratio) if target_ratio > 1 else 2.0

ZeroDivisionError: division by zero

Thanks in advance for your help!

[kushalkolar]

Duplicate of #285