Question

我正在尝试执行以下程序，并且我在结果结束时收到警告。请告诉我有关错误的信息。

“/ usr / lib / pymodules / python2.7 / matplotlib / collections.py:548:UmerwayWarning：元素比较失败;改为返回标量，但将来会执行元素比较如果self._edgecolors =='face'：“

        import numpy as np
        import matplotlib.pyplot as plt

        colorinterpolation = 50
        colourMap = plt.cm.jet

        x =  input('Number of nodes in the vertical axis: ')
        y =  input('Number of nodes in the horizontal axis: ')
        TI = input('Initial tempertature: ')
        TN = input('Northern boundary temperature: ')
        TS = input('Southern boundary temperature: ')
        TE = input('Eastern boundary temperature: ')
        TW = input('Western boundary temperature: ')
        t  = input('Number of time steps needed: ')
        C1 = input('Courant number in x direction: ')
        C2 = input('Courant number in y direction: ')
        C3 = 1 - (2*C1) - (2*C2)

        T = np.zeros((x, y))
        T.fill(TI)
        print 'Time step 0'
        print T
        for timestep in range(1, t+1):
            T[:1, :] = TN
            T[x-1:, :] = TS
            T[:, :1] = TW
            T[:, y-1:] = TE 
            print 'Time step', timestep 
            for j in range(1, y-1, 1):
                for i in range(1, x-1, 1):
                    T[i, j] = T[i, j]*C3 + C1*(T[i+1,j] + T[i-1, j]) + C2*(T[i, j+1] + T[i, j-1])
            print T

       plt.contourf(np.flipud(T), colorinterpolation, cmap=colourMap)
       plt.title('2-D transient heat conduction')
       plt.colorbar()
       plt.show()

Answer 1

请注意，这实际上并不是一个错误，只是一个警告。所以你可以忽略它，否则一切都按预期工作。这可能是由版本之间的某些不匹配引起的，例如， here

如果你真的想要摆脱这个警告，你可以考虑更新numpy和matplotlib。

使用contourf时Python Matpolotlib错误

1 个答案: