使用以下网站: https://scikit-learn.org/stable/auto_examples/manifold/plot_lle_digits.html#sphx-glr-auto-examples-manifold-plot-lle-digits-pyhttps://scikit-learn.org/stable/auto_examples/manifold/plot_swissroll.html#sphx-glr-auto-examples-manifold-plot-swissroll-py
我设法在MNIST数据集和swissroll数据集上获得了LLE,但不知何故,我不知道如何使它在像https://www.kaggle.com/manufacturingai/predicting-fraud-w-fast-ai这样的外部数据集上运行
我的尝试如下:
import numpy as np
import matplotlib.pyplot as plt
import pandas as pd
%matplotlib inline
from matplotlib import offsetbox
from sklearn import (manifold, datasets)
n_neighbors = 30
f_fontsize = 8
data = np.genfromtxt('../content/creditcard.csv', skip_header=True)
features = data[:, :3]
targets = data[:, 3] # The last column is identified as the target
def plotcreditfraudfig(X, color, X_sr, err):
fig = plt.figure()
ax = fig.add_subplot(211, projection='3d')
ax.scatter(X[:, 0], X[:, 1], X[:, 2],cmap=plt.cm.Spectral)
ax.set_title("Original data")
ax = fig.add_subplot(212)
ax.scatter(X_sr[:, 0], X_sr[:, 1],cmap=plt.cm.Spectral)
plt.axis('tight')
plt.xticks([]), plt.yticks([])
plt.title('Projected data')
plt.show()
clf = manifold.LocallyLinearEmbedding(n_neighbors=n_neighbors, n_components=2, method='standard')
clf.fit(X=features, y=targets)
print("Done. Reconstruction error: %g" %clf.reconstruction_error_)
X_llecf=clf.transform(X)
plot_embedding(X_llecf, "Locally Linear Embedding")
---------------------------------------------------------------------------
IndexError Traceback (most recent call last)
<ipython-input-106-91224a1ba194> in <module>()
1 data = np.genfromtxt('../content/creditcard.csv', skip_header=True)
----> 2 features = data[:, :3]
3 targets = data[:, 3] # The last column is identified as the target
4
5 clf = manifold.LocallyLinearEmbedding(n_neighbors=n_neighbors, n_components=2, method='standard')
IndexError: too many indices for array: array is 1-dimensional, but 2 were indexed
我通过将功能和目标更改为:
但我必须做更多: 因为矩阵不是半正定矩阵,所以在声明X_特征和y_目标之前,我必须清除一些行:
相关问题 更多 >
编程相关推荐