Error drawing forecast over line chart

[afy97]

Timeseries version

0.3.12

Orange version

3.31.1

Expected behavior

Models should draw estimated values in line chart

Actual behavior

All the values, even the original data, gets shuffled and stacked to start or end of the line chart

Steps to reproduce the behavior

1. Load the bug_report.tab (the table file zipped and attached to the end)
2. Convert to time series using Index feature
3. Input data to line chart

Step 3 result in line chart

4. Create any model, VAR in this case but same for ARIMA too, and use it to forecast on line chart

Step 4 result in line chart

Pipeline screenshot

Model details (changing parameters does not effect the erroneous results)

Additional info (worksheets, data, screenshots, ...)

bug_report.tab.zip

[ajdapretnar]

When trying to reproduce this, I get two separate errors.

1. When I set Index as a sequential attribute in As Timeseries:

   ----------------------------- TypeError Exception -----------------------------
   Traceback (most recent call last):
   File "/Users/ajda/orange/orange-widget-base/orangewidget/gui.py", line 2258, in __call__
   self.func(**kwds)
   File "/Users/ajda/orange/orange3-timeseries/orangecontrib/timeseries/widgets/owtabletotimeseries.py", line 71, in _on_attribute_changed
   self.commit.deferred()
   File "/Users/ajda/orange/orange-widget-base/orangewidget/gui.py", line 1995, in conditional_commit
   do_commit()
   File "/Users/ajda/orange/orange-widget-base/orangewidget/gui.py", line 2003, in do_commit
   commit.call()
   File "/Users/ajda/orange/orange-widget-base/orangewidget/gui.py", line 1870, in call
   acting_func(instance)
   File "/Users/ajda/orange/orange3-timeseries/orangecontrib/timeseries/widgets/owtabletotimeseries.py", line 117, in commit
   if np.isnan(times).any():
   TypeError: ufunc 'isnan' not supported for the input types, and the inputs could not be safely coerced to any supported types according to the casting rule ''safe''
   -------------------------------------------------------------------------------

2. When I use VAR as forecast:

   -------------------------- AssertionError Exception ---------------------------
   Traceback (most recent call last):
   File "/Users/ajda/orange/orange-canvas-core/orangecanvas/scheme/signalmanager.py", line 1047, in __process_next
   if self.__process_next_helper(use_max_active=True):
   File "/Users/ajda/orange/orange-canvas-core/orangecanvas/scheme/signalmanager.py", line 1085, in __process_next_helper
   self.process_node(selected_node)
   File "/Users/ajda/orange/orange-canvas-core/orangecanvas/scheme/signalmanager.py", line 713, in process_node
   self.send_to_node(node, signals_in)
   File "/Users/ajda/orange/orange-widget-base/orangewidget/workflow/widgetsscheme.py", line 806, in send_to_node
   self.process_signals_for_widget(node, widget, signals)
   File "/Users/ajda/orange/orange-widget-base/orangewidget/workflow/widgetsscheme.py", line 820, in process_signals_for_widget
   process_signals_for_widget(widget, signals, workflow)
   File "/Users/ajda/.pyenv-x86/versions/3.9.10/lib/python3.9/functools.py", line 888, in wrapper
   return dispatch(args[0].__class__)(*args, **kw)
   File "/Users/ajda/orange/orange-widget-base/orangewidget/workflow/widgetsscheme.py", line 923, in process_signals_for_widget
   handle_new_signals(widget, workflow)
   File "/Users/ajda/.pyenv-x86/versions/3.9.10/lib/python3.9/functools.py", line 888, in wrapper
   return dispatch(args[0].__class__)(*args, **kw)
   File "/Users/ajda/orange/orange-widget-base/orangewidget/workflow/widgetsscheme.py", line 910, in handle_new_signals
   widget.handleNewSignals()
   File "/Users/ajda/orange/orange3-timeseries/orangecontrib/timeseries/widgets/owlinechart.py", line 749, in handleNewSignals
   self.setup_plots()
   File "/Users/ajda/orange/orange3-timeseries/orangecontrib/timeseries/widgets/owlinechart.py", line 754, in setup_plots
   self._setup_plot(i, params)
   File "/Users/ajda/orange/orange3-timeseries/orangecontrib/timeseries/widgets/owlinechart.py", line 766, in _setup_plot
   self.__extract_data(self.data, var, self.forecast, is_time_var)
   File "/Users/ajda/orange/orange3-timeseries/orangecontrib/timeseries/widgets/owlinechart.py", line 801, in __extract_data
   assert len(x_total) == len(y_pred) + len(y_true)
   AssertionError
   -------------------------------------------------------------------------------