マーカーを画像にして散布図

picture_scatter_plot.py

#picture scatter plot
%matplotlib inline
import numpy as np 
import matplotlib.pyplot as plt 
from matplotlib.offsetbox import OffsetImage, AnnotationBbox 

def imscatter(x, y, image, ax=None, zoom=1): 
    if ax is None: 
     ax = plt.gca() 
    try: 
     image = plt.imread(image) 
    except TypeError: 
     # Likely already an array... 
     pass 
    im = OffsetImage(image, zoom=zoom) 
    x, y = np.atleast_1d(x, y) 
    artists = [] 
    for x0, y0 in zip(x, y): 
     ab = AnnotationBbox(im, (x0, y0), xycoords='data', frameon=False) 
     artists.append(ax.add_artist(ab)) 
    ax.update_datalim(np.column_stack([x, y])) 
    ax.autoscale() 
    return artists 

x,y =np.random.rand(2, 20)

image_path = 'cactus5.png' 
fig, ax = plt.subplots() 
imscatter(x, y, image_path, ax=ax,  zoom=.25) 
ax.plot(x, y, 'ko',alpha=0) 
plt.savefig('cactus_plot.png',dpi=200, transparent=False)
plt.show()