将过采样数据集保存为 pandas 中的 csv 文件

Saving oversampled dataset as csv file in pandas

我是新手Python,如果说的太简单,提前致歉。找不到任何东西,this question 没有帮助。

我的密码是

# Split data
y = starbucks_smote.iloc[:, -1]
X = starbucks_smote.drop('label', axis = 1)

# Count labels by type
counter = Counter(y)
print(counter)
Counter({0: 9634, 1: 2895})

# Transform the dataset
oversample = SMOTE()
X, y = oversample.fit_resample(X, y)

# Print the oversampled dataset
counter = Counter(y)
print(counter)
Counter({0: 9634, 1: 9634})

如何保存过采样数据集以备将来使用?

我试过了

data_res = np.concatenate((X, y), axis = 1)
data_res.to_csv('sample_smote.csv')

遇到错误

ValueError: all the input arrays must have same number of dimensions, 
but the array at index 0 has 2 dimension(s) and the array at index 1 has 1 dimension(s)

感谢任何提示!

您可以创建数据框:

data_res = pd.DataFrame(X)
data_res['y'] = y

然后将 data_res 保存为 CSV。

基于连接 od numpy.arrays 的解决方案也是可能的,但需要 np.vstack 才能使维度兼容:

data_res = np.concatenate((X, np.vstack(y)), axis = 1)
data_res = pd.DataFrame(data_res)