new_contents: import numpy as np
  from sklearn.decomposition import PCA
  from sklearn.cross_validation import train_test_split
  
  # create X1 data and label
  X1 = np.loadtxt("slit.txt")
  pca = PCA(n_components=1000)
  pca.fit(X1)
  a = np.size(X1)
  X1_label = np.empty(a, 1)
  for i in X1_label:
      X1_label[i] = 0
  
  # create X2 data and label
  X2 = np.loadtxt("impingement.txt")
  pca = PCA(n_components=1000)
  pca.fit(X2)
  b = np.size(X2)
  X2_label = np.empty(b, 1)
  for i in X2_label:
      X2_label[i] = 1
  
  # train and test (not finished)
  
subject: Add files via upload