Matplotlib 在缩放时绘制错误的分辨率

Question

我正在使用 matplotlib 绘制层次聚类，

import numpy as np

from scipy.cluster.hierarchy import dendrogram

def plot_dendrogram(model, **kwargs):

    # Children of hierarchical clustering
    children = model.children_

    # Distances between each pair of children
    # Since we don't have this information, we can use a uniform one for plotting
    distance = np.arange(children.shape[0])



    # The number of observations contained in each cluster level
    no_of_observations = np.arange(2, children.shape[0]+2)

    # Create linkage matrix and then plot the dendrogram
    linkage_matrix = np.column_stack([children, distance, no_of_observations]).astype(float)

    # Plot the corresponding dendrogram
    dendrogram(linkage_matrix, **kwargs)

plt.figure(figsize=(100,100))
plt.title('Hierarchical Clustering Dendrogram')
plot_dendrogram(clustering, labels=liste_tags)
plt.show()

我可以可视化层次聚类，但是绘图的质量和分辨率并不好。尤其是当我保存绘图并尝试放大以查看标签时。

我得到这张图片：

Answer 1

MatPlotLib Figure 对象有一个dpi 参数。只需设置plt.figure(figsize=(100,100), dpi=300) 之类的内容即可。