我正在尝试使用 matplotlib 对心电图信号进行实时分析,但问题甚至在此之前就开始了。
我使用 PyCharm IDE,目前使用 Python 3.3,我的操作系统是 Windows 8.1。
对于 Matplotlib,我从这里下载了 matplotlib 和依赖项(numpy、six、dateutil、pyparsing、pytz)(Python 3.3 的版本):http://www.lfd.uci.edu/~gohlke/pythonlibs/ http://www.lfd.uci.edu/~gohlke/pythonlibs/并将其安装在Python33文件夹中。
现在如果我尝试:
from matplotlib.pyplot import plot, show
plot(range(10))
show()
or:
import pylab
from pylab import *
xAchse=pylab.arange(0,100,1)
yAchse=pylab.array([0]*100)
fig = pylab.figure(1)
ax = fig.add_subplot(111)
ax.grid(True)
ax.set_title("Realtime Waveform Plot")
ax.set_xlabel("Time")
ax.set_ylabel("Amplitude")
ax.axis([0,100,-1.5,1.5])
line1=ax.plot(xAchse,yAchse,'-')
manager = pylab.get_current_fig_manager()
values=[]
values = [0 for x in range(100)]
Ta=0.01
fa=1.0/Ta
fcos=3.5
Konstant=cos(2*pi*fcos*Ta)
T0=1.0
T1=Konstant
def SinwaveformGenerator(arg):
global values,T1,Konstant,T0
#ohmegaCos=arccos(T1)/Ta
#print "fcos=", ohmegaCos/(2*pi), "Hz"
Tnext=((Konstant*T1)*2)-T0
if len(values)%100>70:
values.append(random()*2-1)
else:
values.append(Tnext)
T0=T1
T1=Tnext
def RealtimePloter(arg):
global values
CurrentXAxis=pylab.arange(len(values)-100,len(values),1)
line1[0].set_data(CurrentXAxis,pylab.array(values[-100:]))
ax.axis([CurrentXAxis.min(),CurrentXAxis.max(),-1.5,1.5])
manager.canvas.draw()
#manager.show()
timer = fig.canvas.new_timer(interval=20)
timer.add_callback(RealtimePloter, ())
timer2 = fig.canvas.new_timer(interval=20)
timer2.add_callback(SinwaveformGenerator, ())
timer.start()
timer2.start()
pylab.show()
对于一个小测试,我得到两个不同的错误。对于第一个,其内容如下:
Traceback (most recent call last):
File "<frozen importlib._bootstrap>", line 1519, in _find_and_load_unlocked
AttributeError: 'module' object has no attribute __path__
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "C:/Users/Timo/PycharmProjects/GUI_test/matplotlib.py", line 1, in <module>
from matplotlib.pyplot import plot, show
File "C:\Users\Timo\PycharmProjects\GUI_test\matplotlib.py", line 1, in <module>
from matplotlib.pyplot import plot, show
ImportError: No module named 'matplotlib.pyplot'; matplotlib is not a package
对于第二个更大的例子是这样的:
Traceback (most recent call last):
File "C:/Users/Timo/PycharmProjects/GUI_test/matplotlib.py", line 1, in <module>
import pylab
File "C:\Python33\lib\site-packages\pylab.py", line 1, in <module>
from matplotlib.pylab import *
File "C:\Users\Timo\PycharmProjects\GUI_test\matplotlib.py", line 4, in <module>
xAchse=pylab.arange(0,100,1)
AttributeError: 'module' object has no attribute 'arange'
之后我将导入更改为 Pycharm 希望我使用的导入。from matplotlib import pylab
但这仅仅导致了ImportError. cannot import pylab
有趣的是,如果我在 Python 控制台中运行这些小测试,它工作得很好,所以我猜测它与 PyCharm 有关......
我还尝试将 matplotlib 的确切路径添加到 Path 变量,但这导致了另一个错误。