我使用 tsfresh 从时间序列数据中提取特征，并将结果保存到 pandas.DataFrame。如何仅提取使用以下命令调用的功能名称:
features.ix[0].index
在特征名称前没有“u”并且能够将名称列另存为 txt 文件？
import numpy as np
import pandas as np
>>> (features.ix[0].index)
Index([ u'flux__time_reversal_asymmetry_statistic__lag_2',
u'flux__median',
u'flux__mean_abs_change_quantiles__qh_0.8__ql_0.0',
u'flux__mean_abs_change_quantiles__qh_0.4__ql_0.8',
u'flux__mean_abs_change_quantiles__qh_0.4__ql_0.4',
u'flux__sum_of_reoccurring_data_points',
u'flux__mean_abs_change_quantiles__qh_0.4__ql_0.6',
u'flux__mean_abs_change_quantiles__qh_0.4__ql_0.0',
u'flux__number_peaks__n_3',
u'flux__mean_abs_change_quantiles__qh_0.4__ql_0.2',
...
u'flux__fft_coefficient__coeff_0',
u'flux__fft_coefficient__coeff_1',
u'flux__fft_coefficient__coeff_2',
u'flux__fft_coefficient__coeff_3',
u'flux__fft_coefficient__coeff_4',
u'flux__fft_coefficient__coeff_5',
u'flux__fft_coefficient__coeff_6',
u'flux__fft_coefficient__coeff_7',
u'flux__fft_coefficient__coeff_8',
u'flux__fft_coefficient__coeff_9'],
dtype='object', length=222)
请您参考如下方法:
'u' 只是一个 unicode 前缀，这不会写入文件，无论如何转换为系列并调用 to_csv :
features.ix[0].index.to_series().to_csv(your_file_path)
例如:
In[36]:
df.index.to_series().to_csv()
Out[36]: 'flux__time_reversal_asymmetry_statistic__lag_2,flux__time_reversal_asymmetry_statistic__lag_2\nflux__median,flux__median\nflux__mean_abs_change_quantiles__qh_0.8__ql_0.0,flux__mean_abs_change_quantiles__qh_0.8__ql_0.0\nflux__mean_abs_change_quantiles__qh_0.4__ql_0.8,flux__mean_abs_change_quantiles__qh_0.4__ql_0.8\nflux__mean_abs_change_quantiles__qh_0.4__ql_0.4,flux__mean_abs_change_quantiles__qh_0.4__ql_0.4\nflux__sum_of_reoccurring_data_points,flux__sum_of_reoccurring_data_points\nflux__mean_abs_change_quantiles__qh_0.4__ql_0.6,flux__mean_abs_change_quantiles__qh_0.4__ql_0.6\nflux__mean_abs_change_quantiles__qh_0.4__ql_0.0,flux__mean_abs_change_quantiles__qh_0.4__ql_0.0\nflux__number_peaks__n_3,flux__number_peaks__n_3\nflux__mean_abs_change_quantiles__qh_0.4__ql_0.2,flux__mean_abs_change_quantiles__qh_0.4__ql_0.2\nflux__fft_coefficient__coeff_0,flux__fft_coefficient__coeff_0\nflux__fft_coefficient__coeff_1,flux__fft_coefficient__coeff_1\nflux__fft_coefficient__coeff_2,flux__fft_coefficient__coeff_2\nflux__fft_coefficient__coeff_3,flux__fft_coefficient__coeff_3\nflux__fft_coefficient__coeff_4,flux__fft_coefficient__coeff_4\nflux__fft_coefficient__coeff_5,flux__fft_coefficient__coeff_5\nflux__fft_coefficient__coeff_6,flux__fft_coefficient__coeff_6\nflux__fft_coefficient__coeff_7,flux__fft_coefficient__coeff_7\nflux__fft_coefficient__coeff_8,flux__fft_coefficient__coeff_8\nflux__fft_coefficient__coeff_9,flux__fft_coefficient__coeff_9\n'
