[英]displaying 100 mnist dataset
這是我用來打印 100 mnist 數據的原始未簡化圖片的代碼,但它不斷給我一個錯誤。 即使嘗試了很多,我也找不到解決方案。 征求建議
from sklearn.datasets import fetch_openml
mnist = fetch_openml('mnist_784')
X = mnist["data"]
y = mnist["target"]
X_train, X_test, y_train, y_test = X[:60000], X[60000:], y[:60000],y[60000:]
pca = PCA()
pca.fit(X_train)
cumsum = np.cumsum(pca.explained_variance_ratio_)
d = np.argmax(cumsum >= 0.90) + 1
#Setup a figure 8 inches by 8 inches
fig = plt.figure(figsize=(8,8))
fig.subplots_adjust(left=0, right=1, bottom=0, top=1, hspace=0.05, wspace=0.05)
for i in range(100):
ax = fig.add_subplot(10, 10, i+1, xticks=[], yticks=[])
ax.imshow(X_train[i].reshape(28,28), cmap=plt.cm.bone, interpolation='nearest')
plt.show()
這就是您的 plot 顯示語句仍在循環中的地方。 只需將其移出循環,它就會顯示正常。 給下面一個 go;
from sklearn.datasets import fetch_openml
from sklearn.decomposition import PCA
from sklearn.model_selection import train_test_split
import numpy as np
import matplotlib.pyplot as plt
mnist = fetch_openml('mnist_784')
X = mnist["data"]
y = mnist["target"]
X_train, X_test, y_train, y_test = train_test_split(X, y, test_size=0.20,
random_state=44)
pca = PCA()
pca.fit(X_train)
fig = plt.figure(figsize=(8,8))
fig.subplots_adjust(left=0, right=1, bottom=0, top=1, hspace=0.05, wspace=0.05)
for i in range(100):
ax = fig.add_subplot(10, 10, i+1, xticks=[], yticks=[])
ax.imshow(X_train[i].reshape(28,28), cmap=plt.cm.bone, interpolation='nearest')
plt.show()
import matplotlib.pyplot as plt
fig,ax = plt.subplots(5, 10)
for i in range(10):
for j in range(10):
ax[i,j].imshow(X_train[(10*i)+j].reshape(8, 8), cmap='binary')
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