我正在尝试流式传输通过 pandas df.plot() 方法生成的 matplotlib,但无法在 matplotlib 画布上渲染图像。
这是我正在做的
import cStringIO
import matplotlib.pyplot as plt
import pandas
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
labels = ['a', 'b', 'c', 'd', 'e']
s = pandas.Series(np.random.randn(5), index=labels)
fig = plt.figure()
s.plot()
canvas = FigureCanvas(fig)
output = cStringIO.StringIO()
canvas.print_png(output)
fh=open('check.png','w')
fh.write(output.getvalue())
check.png 原来是空白的。我想我无法将熊猫绘图函数生成的绘图渲染到画布上。
第二次尝试:查看坐标轴但没有数据
import cStringIO
import matplotlib.pyplot as plt
import pandas
import numpy as np
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
labels = ['a', 'b', 'c', 'd', 'e']
s = pandas.Series(np.random.randn(5), index=labels)
fig = plt.figure()
ax = fig.add_subplot(111)
s.plot(ax=ax)
canvas = FigureCanvas(fig)
output = cStringIO.StringIO()
canvas.print_png(output)
fh=open('check.png','w')
fh.write(output.getvalue())
谢谢!-阿比