当前位置: 首页>>代码示例>>Python>>正文


Python multiarray.normalize_axis_index方法代码示例

本文整理汇总了Python中numpy.core.multiarray.normalize_axis_index方法的典型用法代码示例。如果您正苦于以下问题:Python multiarray.normalize_axis_index方法的具体用法?Python multiarray.normalize_axis_index怎么用?Python multiarray.normalize_axis_index使用的例子?那么, 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numpy.core.multiarray的用法示例。


在下文中一共展示了multiarray.normalize_axis_index方法的1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: _raw_fft

# 需要导入模块: from numpy.core import multiarray [as 别名]
# 或者: from numpy.core.multiarray import normalize_axis_index [as 别名]
def _raw_fft(a, n=None, axis=-1, init_function=fftpack.cffti,
             work_function=fftpack.cfftf, fft_cache=_fft_cache):
    a = asarray(a)
    axis = normalize_axis_index(axis, a.ndim)

    if n is None:
        n = a.shape[axis]

    if n < 1:
        raise ValueError("Invalid number of FFT data points (%d) specified."
                         % n)

    # We have to ensure that only a single thread can access a wsave array
    # at any given time. Thus we remove it from the cache and insert it
    # again after it has been used. Multiple threads might create multiple
    # copies of the wsave array. This is intentional and a limitation of
    # the current C code.
    wsave = fft_cache.pop_twiddle_factors(n)
    if wsave is None:
        wsave = init_function(n)

    if a.shape[axis] != n:
        s = list(a.shape)
        if s[axis] > n:
            index = [slice(None)]*len(s)
            index[axis] = slice(0, n)
            a = a[tuple(index)]
        else:
            index = [slice(None)]*len(s)
            index[axis] = slice(0, s[axis])
            s[axis] = n
            z = zeros(s, a.dtype.char)
            z[tuple(index)] = a
            a = z

    if axis != a.ndim - 1:
        a = swapaxes(a, axis, -1)
    r = work_function(a, wsave)
    if axis != a.ndim - 1:
        r = swapaxes(r, axis, -1)

    # As soon as we put wsave back into the cache, another thread could pick it
    # up and start using it, so we must not do this until after we're
    # completely done using it ourselves.
    fft_cache.put_twiddle_factors(n, wsave)

    return r 
开发者ID:Frank-qlu,项目名称:recruit,代码行数:49,代码来源:fftpack.py


注:本文中的numpy.core.multiarray.normalize_axis_index方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。