[CTGAN] CTGAN ToyEX

Author

신록예찬

Published

July 19, 2023

imports

import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
from ctgan import CTGAN
from ctgan import load_demo

data

x1 = np.random.randn(1000).tolist()
y1 = ['A']*1000
x2 = (np.random.randn(100)+5).tolist()
y2 = ['B']*100

df = pd.DataFrame({'x':x1+x2, 'y':y1+y2})
df

	x	y
0	-0.557100	A
1	1.586981	A
2	1.867204	A
3	-1.377673	A
4	-0.013144	A
...	...	...
1095	5.758539	B
1096	7.837548	B
1097	5.462159	B
1098	4.565613	B
1099	2.790882	B

1100 rows × 2 columns

plt.hist(df.x,bins=50)

(array([ 1.,  0.,  1.,  3.,  2., 12., 19., 32., 44., 30., 63., 66., 85.,
        73., 96., 87., 77., 73., 66., 56., 36., 28., 19., 17.,  7.,  3.,
         4.,  2.,  2.,  2.,  4.,  5.,  5.,  5., 10.,  9.,  8., 13.,  6.,
         6.,  8.,  3.,  4.,  2.,  1.,  0.,  2.,  0.,  0.,  3.]),
 array([-3.30563479, -3.08115892, -2.85668304, -2.63220717, -2.4077313 ,
        -2.18325542, -1.95877955, -1.73430368, -1.5098278 , -1.28535193,
        -1.06087606, -0.83640018, -0.61192431, -0.38744844, -0.16297256,
         0.06150331,  0.28597918,  0.51045506,  0.73493093,  0.9594068 ,
         1.18388268,  1.40835855,  1.63283442,  1.8573103 ,  2.08178617,
         2.30626204,  2.53073792,  2.75521379,  2.97968966,  3.20416554,
         3.42864141,  3.65311728,  3.87759316,  4.10206903,  4.3265449 ,
         4.55102078,  4.77549665,  4.99997252,  5.22444839,  5.44892427,
         5.67340014,  5.89787601,  6.12235189,  6.34682776,  6.57130363,
         6.79577951,  7.02025538,  7.24473125,  7.46920713,  7.693683  ,
         7.91815887]),
 <BarContainer object of 50 artists>)

CTGAN

# Names of the columns that are discrete
discrete_columns = ['y']
ctgan = CTGAN(epochs=500) # 겁나많이해야하네?
ctgan.fit(df, discrete_columns)

# Create synthetic data
df2 = ctgan.sample(1000)

Exception ignored on calling ctypes callback function: <function _ThreadpoolInfo._find_modules_with_dl_iterate_phdr.<locals>.match_module_callback at 0x7f37484ab430>
Traceback (most recent call last):
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 400, in match_module_callback
    self._make_module_from_path(filepath)
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 515, in _make_module_from_path
    module = module_class(filepath, prefix, user_api, internal_api)
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 606, in __init__
    self.version = self.get_version()
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 646, in get_version
    config = get_config().split()
AttributeError: 'NoneType' object has no attribute 'split'
Exception ignored on calling ctypes callback function: <function _ThreadpoolInfo._find_modules_with_dl_iterate_phdr.<locals>.match_module_callback at 0x7f37484ab430>
Traceback (most recent call last):
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 400, in match_module_callback
    self._make_module_from_path(filepath)
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 515, in _make_module_from_path
    module = module_class(filepath, prefix, user_api, internal_api)
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 606, in __init__
    self.version = self.get_version()
  File "/home/coco/anaconda3/envs/py38/lib/python3.8/site-packages/threadpoolctl.py", line 646, in get_version
    config = get_config().split()
AttributeError: 'NoneType' object has no attribute 'split'

df2.groupby('y').count()

	x
y
A	530
B	470

plt.hist(df.x,bins=50,alpha=0.5,label='real')
plt.hist(df2.x,bins=50,alpha=0.5,label='syn')
plt.legend()

df2[df2.y=='A'].hist()

array([[<Axes: title={'center': 'x'}>]], dtype=object)

df2[df2.y=='B'].hist()

array([[<Axes: title={'center': 'x'}>]], dtype=object)