Comments (2)
It seems like a problem resulting from using a sparse matrix. To be honest, sparse matrix were completely neglected when writing this. Which kinda makes sense given when they are usually needed and the fact that most methods here (definitely SMOTE) rely on local density estimations to generate new samples.
I'll take a look over the weekend.
from imbalanced-learn.
I found above problem cause by y_train
be converted to pandas.Series
in some place at my code. After I fix that, sparse
become pain, you are right.
concatenate((overx,self.x[self.y == key],self.x[self.y == key][indx]), axis=0)
Traceback (most recent call last):
File "C:\Python27\lib\site-packages\IPython\core\interactiveshell.py", line 3066, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-40-b5ea4e093941>", line 1, in <module>
concatenate((overx,self.x[self.y == key],self.x[self.y == key][indx]), axis=0)
ValueError: zero-dimensional arrays cannot be concatenated
test code:
a = sparse.csr_matrix(np.zeros((100,200)))
b = sparse.csr_matrix(np.zeros((200,200)))
c = sparse.csr_matrix(np.zeros((300,200)))
np.concatenate((a,b,c), axis=0)
>>> ValueError: zero-dimensional arrays cannot be concatenated .....
sulotion:
import scipy.sparse as sp
sparse.vstack((a, b, c))
>>> <600x200 sparse matrix of type '<type 'numpy.float64'>'
with 0 stored elements in Compressed Sparse Row format>
Add a custom function to detect the type then choose concatenate
or vstack
?
Maybe there are some similar problem like this, I would search for is there any exist package would play this situation well.
from imbalanced-learn.
Related Issues (20)
- KMeansSMOTE balance_threshold formula HOT 2
- Add mypy stuff HOT 1
- Columns and DataType Not Explicitly Set on line 55 of _validation.py HOT 1
- [BUG] `_transform_one` fails on sparse DataFrame
- [BUG] RandomOversampler crashes on timedelta64 column that only contains NaTs
- [BUG] `BorderlineSMOTE` takes an unusually long amount of time in later versions of scikit-learn HOT 5
- Compatibility with scikit-learn 1.4.0 HOT 3
- [BUG] `sklearn=1.4` TypeError: BaggingClassifier.__init__() got an unexpected keyword argument 'base_estimator'
- [BUG] Attribute Error: Pipeline object has no attribute "_check_fit_params" HOT 1
- [BUG] Test issues with sklearn 1.4 HOT 3
- [SO] SMOTEEN generates imbalance dataset HOT 2
- AttributeError: 'NoneType' object has no attribute 'split' HOT 3
- [BUG]sampling_strategy working incorrectly with random oversampling HOT 2
- SmoteNC leads to Killed process HOT 2
- [BUG] ImportError: cannot import name '_check_X' from 'imblearn.utils._validation' (/usr/local/lib/python3.10/dist-packages/imblearn/utils/_validation.py) HOT 2
- fix scikit-learn 1.5 parse_version link HOT 1
- Python 3.13: Two tests from test_docstring.py are failing HOT 2
- New error message from established workflow: AttributeError: 'Pipeline' object has no attribute '_check_fit_params'[BUG] HOT 7
- how can the tool be used with DASK-ML to deal with large data HOT 1
- [BUG] ImportError: cannot import name '_get_column_indices' from 'sklearn.utils with pre-release versions HOT 1
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from imbalanced-learn.