np.polyroots()
方法用于计算多项式级数的根。返回多项式的根。
用法:np.polyroots(c)
参数:
c :[array_like] 1-D arrays of polynomial series coefficients.
返回:[ndarray]系列根的数组。如果所有的根都是真实的,那么输出也是真实的,否则它是复杂的。
代码1:
# Python program explaining
# numpy.polyroots() method
# importing numpy as np
# and numpy.polynomial.polynomial module as geek
import numpy as np
import numpy.polynomial.polynomial as geek
# Input polynomial series coefficients
s = (2, 4, 8)
# using np.polyroots() method
res = geek.polyroots(s)
# Resulting polynomial series coefficient
print (res)
输出:
[-0.25-0.4330127j -0.25+0.4330127j]
代码2:
# Python program explaining
# numpy.polyroot() method
# importing numpy as np
# and numpy.polynomial.polynomial module as geek
import numpy as np
import numpy.polynomial.polynomial as geek
# polynomial series coefficients
s = (1, 2, 3, 4, 5)
# using np.polyroots() method
res = geek.polyroots(s)
# Resulting polynomial series
print (res)
输出:
[-0.53783227-0.35828469j -0.53783227+0.35828469j 0.13783227-0.67815439j 0.13783227+0.67815439j]
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注:本文由纯净天空筛选整理自jana_sayantan大神的英文原创作品 Python | Numpy np.polyroots() method。非经特殊声明,原始代码版权归原作者所有,本译文未经允许或授权,请勿转载或复制。