polynomial.polyutils.
mapdomain
对输入点应用线性映射。
线性映射 offset + scale*x 映射域的 old 域 new 应用于点 x .
offset + scale*x
要映射的点。如果 x 是ndarray的子类型，子类型将被保留。
决定地图的两个域。每个数组都必须（成功）转换为包含精确两个值的一维数组。
形状相同的点数组 x 在两个域之间应用线性映射之后。
参见
getdomain
mapparms
笔记
这有效地实现了：
System Message: WARNING/2 (xO-OUT＝新 [0] +M（X -旧） [0] ）)
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在哪里？
实例
>>> from numpy.polynomial import polyutils as pu >>> old_domain = (-1,1) >>> new_domain = (0,2*np.pi) >>> x = np.linspace(-1,1,6); x array([-1. , -0.6, -0.2, 0.2, 0.6, 1. ]) >>> x_out = pu.mapdomain(x, old_domain, new_domain); x_out array([ 0. , 1.25663706, 2.51327412, 3.76991118, 5.02654825, # may vary 6.28318531]) >>> x - pu.mapdomain(x_out, new_domain, old_domain) array([0., 0., 0., 0., 0., 0.])
也适用于复数（因此可用于将复数平面中的任何线映射到其中的任何其他线）。
>>> i = complex(0,1) >>> old = (-1 - i, 1 + i) >>> new = (-1 + i, 1 - i) >>> z = np.linspace(old[0], old[1], 6); z array([-1. -1.j , -0.6-0.6j, -0.2-0.2j, 0.2+0.2j, 0.6+0.6j, 1. +1.j ]) >>> new_z = pu.mapdomain(z, old, new); new_z array([-1.0+1.j , -0.6+0.6j, -0.2+0.2j, 0.2-0.2j, 0.6-0.6j, 1.0-1.j ]) # may vary