我刚开始学习Python编程,对Numpy包非常陌生......我仍在尝试理解它。我正在尝试使用欧拉方法解决一个函数。
以下是我的代码:
Z=4
B=8
U=1
C=4
a,b=(0.0,10.0)
n=2000
x0=-1.0
t=linspace (a,b,n)
#-----------------------------------------------------------------------------
def euler (f,x0,t):
n=len (t)
x=np.array(n*[x0,])
for i in xrange (n-1):
float (x[i] + ( t[i+1] - t[i] ) * f( x[i], t[i] ))
return x
#---------------------------------------------------------------------------------
if __name__=="__main__":
def f(x,t):
return float((Z)*[-(1/6)*B*C*x^3+0.5*U*t^2])
#numerical solutions
x_euler=euler(f,x0,t)
#figure
plt.plot (t,x_euler, "b")
xlabel (t)
ylabel (x)
legend ("Euler")
show()
我对这类问题的相似解决方案不太满意。以下是我的Traceback:
Traceback (most recent call last):
File "C:\Python27\testeuler.py", line 45, in <module>
x_euler=euler(f,x0,t)
File "C:\Python27\testeuler.py", line 31, in euler
float (x[i] + ( t[i+1] - t[i] ) * f( x[i], t[i] ))
File "C:\Python27\testeuler.py", line 41, in f
return float((Z)*[-(1/6)*B*C*x^3+0.5*U*t^2])
TypeError: unsupported operand type(s) for ^: 'numpy.float64' and 'numpy.float64'
有人知道可能出了什么问题或有什么建议吗?