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我正在做matplotlib中的vlines图,并将数据集中的所有y值都设为>=0
。我想我的y轴最底部刻度读取0
,但相反,我得到-500。y轴的最小值未应用于matplotlib vlines plot
下面是代码:
#!/usr/bin/env python
import numpy as np
from matplotlib import pyplot as plt, dates as mdates
import datetime as dt, time
# Read the data and turn it into a numpy array
#store = map(lambda line: map(int, line.strip().split()), open(name + '.txt').readlines())
store = [
[1293606162197, 0, 0],
[1293605477994, 63, 0],
[1293605478057, 0, 0],
[1293605478072, 2735, 1249],
[1293606162213, 0, 0],
[1293606162229, 0, 0],
]
nstore = np.array(store)
# Get arrays of each columns in the store array
d = nstore[:,0]
y1 = nstore[:,1]
y2 = nstore[:,2]
# Get arrays of values to be passed to matplotlib
s = d/1000
dts = map(dt.datetime.fromtimestamp, s)
fds = mdates.date2num(dts)
# new figure and subplot
fig = plt.figure()
ax = fig.add_subplot(111)
# Plot using vlines
ax.vlines(fds, [0], y1, 'red')
# set xaxis tick settings
ax.xaxis.set_major_locator(mdates.MinuteLocator())
ax.xaxis.set_major_formatter(mdates.DateFormatter('%m/%d %H:%M'))
for label in ax.xaxis.get_ticklabels():
label.set_rotation('vertical')
fig.subplots_adjust(bottom=.25)
# Set the y axis bottom limit to 0
ax.set_ylim(bottom=0) # <<- THIS DOES NOT SEEM TO BE WORKING
# Save the plot figure
fig.savefig('out.png')
和这里的情节,我得到:
任何人都可以点我什么,我做错了什么?另外,如果你能指出我需要的详细信息,那就太好了。谢谢。
问题是Creating graph with date and time in axis labels with matplotlib
啊,谢谢EOL,让它工作。在面向对象的风格中是否存在这种方法的等价物,因为我将同时并行地绘制许多图。 – 2011-04-05 06:54:13
@Shrikant:我在我的答案中添加了一个面向对象的方法。 – EOL 2011-04-05 06:58:05
我得到一个'TypeError:draw_wrapper()需要至少2个参数(1个给定)'与'ax.draw()',在Ubuntu上运行。 – 2011-04-05 07:15:10