ValueError: Number of columns must be a positive integer, not 0 - pandas

Question

when i want to execute below code and plot figer
scatter_matrix(total_frame)
total_frame is a dataframe like this
the error like this:
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_11336\1619863705.py in <module>
1 total_frame.dropna(how='any')
----> 2 scatter_matrix(total_frame)
3 plt.show()
~\.conda\envs\env2\lib\site-packages\pandas\plotting\_misc.py in scatter_matrix(frame, alpha, figsize, ax, grid, diagonal, marker, density_kwds, hist_kwds, range_padding, **kwargs)
137 hist_kwds=hist_kwds,
138 range_padding=range_padding,
--> 139 **kwargs,
140 )
141
~\.conda\envs\env2\lib\site-packages\pandas\plotting\_matplotlib\misc.py in scatter_matrix(frame, alpha, figsize, ax, grid, diagonal, marker, density_kwds, hist_kwds, range_padding, **kwds)
48 n = df.columns.size
49 naxes = n * n
---> 50 fig, axes = create_subplots(naxes=naxes, figsize=figsize, ax=ax, squeeze=False)
51
52 # no gaps between subplots
~\.conda\envs\env2\lib\site-packages\pandas\plotting\_matplotlib\tools.py in create_subplots(naxes, sharex, sharey, squeeze, subplot_kw, ax, layout, layout_type, **fig_kw)
265
266 # Create first subplot separately, so we can share it if requested
--> 267 ax0 = fig.add_subplot(nrows, ncols, 1, **subplot_kw)
268
269 if sharex:
~\.conda\envs\env2\lib\site-packages\matplotlib\figure.py in add_subplot(self, *args, **kwargs)
770 projection_class, pkw = self._process_projection_requirements(
771 *args, **kwargs)
--> 772 ax = subplot_class_factory(projection_class)(self, *args, **pkw)
773 key = (projection_class, pkw)
774 return self._add_axes_internal(ax, key)
~\.conda\envs\env2\lib\site-packages\matplotlib\axes\_subplots.py in __init__(self, fig, *args, **kwargs)
34 self._axes_class.__init__(self, fig, [0, 0, 1, 1], **kwargs)
35 # This will also update the axes position.
---> 36 self.set_subplotspec(SubplotSpec._from_subplot_args(fig, args))
37
38 #_api.deprecated(
~\.conda\envs\env2\lib\site-packages\matplotlib\gridspec.py in _from_subplot_args(figure, args)
595 f"{len(args)} were given")
596
--> 597 gs = GridSpec._check_gridspec_exists(figure, rows, cols)
598 if gs is None:
599 gs = GridSpec(rows, cols, figure=figure)
~\.conda\envs\env2\lib\site-packages\matplotlib\gridspec.py in _check_gridspec_exists(figure, nrows, ncols)
223 return gs
224 # else gridspec not found:
--> 225 return GridSpec(nrows, ncols, figure=figure)
226
227 def __getitem__(self, key):
~\.conda\envs\env2\lib\site-packages\matplotlib\gridspec.py in __init__(self, nrows, ncols, figure, left, bottom, right, top, wspace, hspace, width_ratios, height_ratios)
385 super().__init__(nrows, ncols,
386 width_ratios=width_ratios,
--> 387 height_ratios=height_ratios)
388
389 _AllowedKeys = ["left", "bottom", "right", "top", "wspace", "hspace"]
~\.conda\envs\env2\lib\site-packages\matplotlib\gridspec.py in __init__(self, nrows, ncols, height_ratios, width_ratios)
51 if not isinstance(ncols, Integral) or ncols <= 0:
52 raise ValueError(
---> 53 f"Number of columns must be a positive integer, not {ncols!r}")
54 self._nrows, self._ncols = nrows, ncols
55 self.set_height_ratios(height_ratios)
ValueError: Number of columns must be a positive integer, not 0
<Figure size 432x288 with 0 Axes>
i search such error and don't find anything,please help me!!!!!

Answer 1

i have solved it,
my data's class is object,the function need num,
so i use pd.convert_dtypes() and it works