I can’t figure out the origin / scope of this error. Please help / advise.
Search doesn’t find a mention in the forum
The error states:
AttributeError: Can only use .cat accessor with a ‘category’ dtype
This makes me think there’s some string / category behaviours being messed up.
However my data is a time field and bunch of floats. They were read in as strings because they contained text errors, so pd.to_numeric(..., errors='coerce') has been called.
I see only the following dtypes on my columns:
datetime64[ns]
float64
…
float64
detailed error track :
----> 2 train_all, y, nas = proc_df(train_all[1:24], ‘target’)
~\fastai\projs\theproj\fastai\structured.py in proc_df(df, y_fld, skip_flds, do_scale, na_dict, preproc_fn, max_n_cat, subset, mapper)
426 for n,c in df.items(): na_dict = fix_missing(df, c, n, na_dict)
427 if do_scale: mapper = scale_vars(df, mapper)
–> 428 for n,c in df.items(): numericalize(df, c, n, max_n_cat)
429 res = [pd.get_dummies(df, dummy_na=True), y, na_dict]
430 if do_scale: res = res + [mapper]~\fastai\projs\theproj\fastai\structured.py in numericalize(df, col, name, max_n_cat)
315 “”"
316 if not is_numeric_dtype(col) and ( max_n_cat is None or col.nunique()>max_n_cat):
–> 317 df[name] = col.cat.codes+1
318
319 def scale_vars(df, mapper):~\Anaconda2\envs\fastai\lib\site-packages\pandas\core\generic.py in getattr(self, name)
3608 if (name in self._internal_names_set or name in self._metadata or
3609 name in self._accessors):
-> 3610 return object.getattribute(self, name)
3611 else:
3612 if name in self._info_axis:~\Anaconda2\envs\fastai\lib\site-packages\pandas\core\accessor.py in get(self, instance, owner)
52 # this ensures that Series.str. is well defined
53 return self.accessor_cls
—> 54 return self.construct_accessor(instance)
55
56 def set(self, instance, value):~\Anaconda2\envs\fastai\lib\site-packages\pandas\core\categorical.py in _make_accessor(cls, data)
2209 def _make_accessor(cls, data):
2210 if not is_categorical_dtype(data.dtype):
-> 2211 raise AttributeError("Can only use .cat accessor with a "
2212 “‘category’ dtype”)
2213 return CategoricalAccessor(data.values, data.index,AttributeError: Can only use .cat accessor with a ‘category’ dtype