Python Pyplot适当的烛台时间戳时代变化和比例

我想知道如何正确处理unix时间戳，并将其绘制为具有适当x轴刻度（相对于x轴时间框架，如分钟、小时、天…）的日期字符串

我有一个带有数字时间戳的烛台图（使用unix历元）。采样间隔120秒时，它看起来是这样的：

使用此代码：

import datetime
import matplotlib.pyplot as plt
from matplotlib.dates import  DateFormatter, epoch2num
from matplotlib.finance import candlestick

results=[[1388898634, 24.339, 24.24389, 24.376, 24.22290666666667, 24.247343013888855, 1724.3410760000002], [1388898514, 24.2444, 24.26181818181818, 24.28, 24.2444, 24.25408960227278, 1875.784091], [1388898394, 24.262727272727272, 24.310416666666665, 24.310416666666665, 24.262727272727272, 24.295351803977244, 389.329334], [1388898274, 24.310499999999998, 24.3996, 24.3996, 24.310499999999998, 24.33321454274891, 536.4064960000003], [1388898154, 24.3998, 24.45051724137931, 24.45051724137931, 24.3998, 24.423427643678153, 313.12763599999994]]

fig, ax = plt.subplots()
fig.subplots_adjust(bottom=0.2)
candlestick(ax, results, width=20)
ax.autoscale_view()
plt.setp( plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
plt.show()

现在我想用日期格式来绘制它，所以我尝试将它移动到适当的纪元：

i=0;
for data in results:
    results[i][0] = epoch2num(data[0])
    i+=1

其紧凑性导致：

results=[[735238.21567129635, 24.339, 24.24389, 24.376, 24.22290666666667, 24.247343013888855, 1724.3410760000002], [735238.21428240743, 24.2444, 24.26181818181818, 24.28, 24.2444, 24.25408960227278, 1875.784091], [735238.2128935185, 24.262727272727272, 24.310416666666665, 24.310416666666665, 24.262727272727272, 24.295351803977244, 389.329334], [735238.21150462958, 24.310499999999998, 24.3996, 24.3996, 24.310499999999998, 24.33321454274891, 536.4064960000003], [735238.21011574077, 24.3998, 24.45051724137931, 24.45051724137931, 24.3998, 24.423427643678153, 313.12763599999994]]

fig, ax = plt.subplots()
fig.subplots_adjust(bottom=0.2)

candlestick(ax, results, width=20)
ax.autoscale_view()
plt.setp( plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
plt.show()

但烛台的阴谋被摧毁了：

我还尝试使用如下格式器映射x轴：

results=[[735238.21567129635, 24.339, 24.24389, 24.376, 24.22290666666667, 24.247343013888855, 1724.3410760000002], [735238.21428240743, 24.2444, 24.26181818181818, 24.28, 24.2444, 24.25408960227278, 1875.784091], [735238.2128935185, 24.262727272727272, 24.310416666666665, 24.310416666666665, 24.262727272727272, 24.295351803977244, 389.329334], [735238.21150462958, 24.310499999999998, 24.3996, 24.3996, 24.310499999999998, 24.33321454274891, 536.4064960000003], [735238.21011574077, 24.3998, 24.45051724137931, 24.45051724137931, 24.3998, 24.423427643678153, 313.12763599999994]]

xfmt = DateFormatter('%Y-%m-%d %H:%M:%S')
fig, ax = plt.subplots()
fig.subplots_adjust(bottom=0.2)
ax.xaxis.set_major_formatter(xfmt)

candlestick(ax, results, width=20)
ax.xaxis_date()
ax.autoscale_view()
plt.setp( plt.gca().get_xticklabels(), rotation=45, horizontalalignment='right')
plt.show()

但在破损的烛台上，它也会将日期时间轴缩放太长

当我重新映射时间戳时，为什么我的烛台图会被破坏？在使用日期时，如何正确缩放x轴（在本例中，我需要显示分钟增量，但我可能希望根据采样率跨越几天或几个月）

---

谢谢

width=1

的

烛台

功能表示1天，而不是1个像素

根据烛台的文档字符串：

烛台（ax，引号，宽度=0.2，上色为'k'，下色为'r'， α=1.0）

宽度：一天的分数用于矩形宽度

将其替换为小值，如

30/86400.0

（表示30秒）：

---

谢谢。我很难找到参数的定义。我忘了python有docstring和help（）函数。@user6972，我在matplotlib文档中找不到

candlestick

函数的文档

candlestick(ax, results, width=30/86400.0)