我对矩阵进行n次运算,这导致nx的2x1矩阵的输出。我将它们附加到列表中,并希望绘制为具有x,y坐标的点。我发现我需要将它们转换为numpy.array,所以我用nx2 ndarray完成并想要绘制[:0]
和[:1]
。当我打印结果时,一切似乎是正确的,当我尝试绘制我完成空白图并且根本没有点。我注意到ndarrays是用空格分隔的,而不是用逗号分隔,但不确定如何解释它。我的代码如下:
import numpy as np
import pylab as pl
class GetMat(object):
def __init__(self):
self.Posp = np.matrix([[1,1],[1,1]])
self.Velp = np.matrix([[1],[1]])
def __call__(self):
self.Posp = self.Posp*np.random.random()
self.Velp = self.Velp*np.random.random()
return self.Posp,self.Velp
def __repr__(self):
return "Posp = \n%s \nVelp = \n%s" % (self.Posp,self.Velp)
class Data(object):
def __init__(self):
self.x = 0
def __call__(self,P,V):
self.x = P*V
return self.x[0,0], self.x[1,0]
def __repr__(self):
return "x = %s" % self.x
def Test():
Nsamples = np.arange(0,10,1)
newMat = GetMat()
dataToPlot = Data()
Xsaved = []
for i in range(len(Nsamples)):
z1,z2 = newMat()
position, velocity = dataToPlot(z1,z2)
Xsaved.append([position, velocity])
print 'Xsaved = %s' % Xsaved
print 'tyep Xsaved %s' % type(Xsaved)
XsavedArr = np.array(Xsaved)
print 'XsavedArr %s' % XsavedArr
print 'tyep XsavedArr %s' % type(XsavedArr)
print 'XsavedArr[:,0] = %s' % XsavedArr[:,0]
print 'XsavedArr[:,1] = %s' % XsavedArr[:,1]
pl.plot(np.array(XsavedArr[:,0]),np.array(XsavedArr[:,1]), linestyle='x-',label = 'Xsaved')
pl.show()
if __name__ == '__main__':
Test()
我预计随机数的正常情节不是空白。我找不到如何以nx2矩阵的形式绘制ndarray
答案 0 :(得分:3)
我不确定您要寻找的是什么样的线条样式,但如果您将线条样式更改为:
,您会看到某些内容linestyle='-'
或者,如果您希望查看标有x
的数据点,
只需删除关键字linestyle
:
pl.plot(np.array(XsavedArr[:,0]),np.array(XsavedArr[:,1]),
'x-',label = 'Xsaved')