原文:https://docs.scipy.org/doc/numpy/reference/generated/numpy.polynomial.hermite_e.hermetrim.html
校对:(虚位以待)
numpy.polynomial.hermite_e.
hermetrim
(c, tol=0)[source]从多项式中删除“小”“拖尾”系数。
“Small” means “small in absolute value” and is controlled by the parameter tol; “trailing” means highest order coefficient(s), e.g., in [0, 1, 1, 0, 0]
(which represents 0 + x + x**2 + 0*x**3 + 0*x**4
) both the 3-rd and 4-th order coefficients would be “trimmed.”
参数: | c:array_like
tol:number,可选
|
---|---|
返回: | 修剪:ndarray
|
上升: | ValueError
|
也可以看看
trimseq
例子
>>> from numpy import polynomial as P
>>> P.trimcoef((0,0,3,0,5,0,0))
array([ 0., 0., 3., 0., 5.])
>>> P.trimcoef((0,0,1e-3,0,1e-5,0,0),1e-3) # item == tol is trimmed
array([ 0.])
>>> i = complex(0,1) # works for complex
>>> P.trimcoef((3e-4,1e-3*(1-i),5e-4,2e-5*(1+i)), 1e-3)
array([ 0.0003+0.j , 0.0010-0.001j])