本文整理汇总了Python中sympy.Poly.iter_all_coeffs方法的典型用法代码示例。如果您正苦于以下问题：Python Poly.iter_all_coeffs方法的具体用法？Python Poly.iter_all_coeffs怎么用？Python Poly.iter_all_coeffs使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类sympy.Poly的用法示例。
在下文中一共展示了Poly.iter_all_coeffs方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_iterators
# 需要导入模块: from sympy import Poly [as 别名]
# 或者: from sympy.Poly import iter_all_coeffs [as 别名]
def test_iterators():
f = Poly(x**5 + x, x)
assert list(f.iter_all_coeffs()) == \
[1, 0, 0, 0, 1, 0]
assert list(f.iter_all_monoms()) == \
[(5,), (4,), (3,), (2,), (1,), (0,)]
assert list(f.iter_all_terms()) == \
[(1, (5,)), (0, (4,)), (0, (3,)), (0, (2,)), (1, (1,)), (0, (0,))]示例2: SymTF
# 需要导入模块: from sympy import Poly [as 别名]
# 或者: from sympy.Poly import iter_all_coeffs [as 别名]
class SymTF(object):
def __init__(self,num,den,var='s'):
self.num = Poly(num,var)
self.den = Poly(den,var)
def __repr__(self,labelstr='systemid.SymTF'):
nstr=str(self.num)
dstr=str(self.den)
n=len(dstr)
m=len(nstr)
shift=(n-m)/2*' '
nstr=nstr.replace('\n','\n'+shift)
tempstr=labelstr+'\n'+shift+nstr+'\n'+'-'*n+'\n '+dstr
return tempstr
def __call__(self,s):
return self.num(s)/self.den(s)
def __add__(self,other):
if hasattr(other,'num') and hasattr(other,'den'):
if len(list(self.den.iter_all_coeffs()))==len(list(other.den.iter_all_coeffs())) and \
list(self.den.iter_all_coeffs())==list(other.den.iter_all_coeffs()):
return SymTF(self.num+other.num,self.den)
else:
return SymTF(self.num*other.den+other.num*self.den,self.den*other.den)
elif isinstance(other, int) or isinstance(other, float):
return SymTF(other*self.den+self.num,self.den)
else:
raise ValueError, 'Do not know how to add SymTF and '+str(other) +' which is of type '+str(type(other))
def __sub__(self,other):
if hasattr(other,'num') and hasattr(other,'den'):
if len(list(self.den.iter_all_coeffs()))==len(list(other.den.iter_all_coeffs())) and \
(list(self.den.iter_all_coeffs())==list(other.den.iter_all_coeffs())).all():
return SymTF(self.num-other.num,self.den)
else:
return SymTF(self.num*other.den-other.num*self.den,self.den*other.den)
elif isinstance(other, int) or isinstance(other, float):
return SymTF(other*self.den-self.num,self.den)
else:
raise ValueError, 'Do not know how to subtract SymTF and '+str(other) +' which is of type '+str(type(other))
def __mul__(self,other):
if hasattr(other,'num') and hasattr(other,'den'):
if self.num == other.den and self.den == other.num:
return 1
elif self.num == other.den:
return self.__class__(other.num,self.den)
elif self.den == other.num:
return self.__class__(self.num,other.den)
else:
return self.__class__(self.num*other.num, \
self.den*other.den)
elif isinstance(other, int) or isinstance(other, float):
return self.__class__(other*self.num,self.den)
def __pow__(self, expon):
"""Basically, go self*self*self as many times as necessary. I
haven't thought about negative exponents. I don't think this
would be hard, you would just need to keep dividing by self
until you got the right answer."""
assert expon >= 0, 'SymTF.__pow__ does not yet support negative exponents.'
out = 1.0
for n in range(expon):
out *= self
return out
def __div__(self,other):
if hasattr(other,'num') and hasattr(other,'den'):
if self.den == other.den and self.num == other.num:
return 1
elif self.den == other.den:
return SymTF(self.num,other.num)
else:
return SymTF(self.num*other.den,self.den*other.num)
elif isinstance(other, int) or isinstance(other, float):
return SymTF(self.num,other*self.den)
def to_num_TF(self,var_dict,dt=0.01,maxt=5.0,myvar='s'):
namespace = var_dict.copy()
num = list(self.num.iter_all_coeffs())
den = list(self.den.iter_all_coeffs())
tf_num = [eval(str(i),namespace) for i in num]
tf_den = [eval(str(i),namespace) for i in den]
print tf_num,tf_den
return TF(tf_num,tf_den,dt=dt,maxt=maxt,myvar=myvar)
def __radd__(self,other):
return self.__add__(other)
def __rmul__(self,other):
return self.__mul__(other)
def __rdiv__(self, other):
return self.__div__(other)
def __truediv__(self,other):
return self.__div__(other)