matplotlib 怎么输出 lnx 对数函数图像啊

asd734619

1. from numpy import *
   
2. from sympy import *
   
3. from matplotlib import pyplot as pl
   
4. x,y = symbols('x y')
   
5. x = arange(-1,1,0.01)
   
6. y = log(x + 1,exp(x))
   
7. pl.plot(x,diff(y,x))
   
8. pl.plot(x,y)
   
9. output()#自定义输出函数

复制代码

y = log(x + 1,exp(x))发生异常: AttributeError
'ImmutableDenseNDimArray' object has no attribute 'as_coefficient'

During handling of the above exception, another exception occurred:


During handling of the above exception, another exception occurred:

  File "C:\Users\86176\Desktop\python\实验.py", line 93, in <module>
    y = log(x + 1,exp(x))
有大佬邦邦吗

asd734619

解决了，两个库函数不能通用，经初始化的x自变量不能带入到numpy库中的log（）函数中，但怎么输出求完导后的函数图像啊，只能先算一遍导数然后重新输入代码吗？