Question

在数据处理期间，我创建一个如下所示的数组：

[array([ 0.08606408]) array([ 0.26071976])
 array([ 0.181566  ,  0.94154611]) array([ 0.1734347 ,  0.94160601])
 array([ 0.17859844,  0.94167483]) array([ 0.16880761,  0.94156277])
 array([ 0.17624151,  0.94149038]) array([ 0.18770433,  0.94181287])
 array([ 0.16707977,  0.94227733]) array([ 0.94162233])
 array([ 0.9426902,  0.9615621]) array([ 0.94195127,  0.96174422])
 array([ 0.94237795,  0.96195226,  0.98059446])
 array([ 0.94249657,  0.96219391,  0.98095329])
 array([ 0.94280697,  0.96286183,  0.98109352])
 array([ 0.94267473,  0.96304417,  0.98252799])]

以下列方式创建：

peakpositions = []
peakpositions.append(stuff)

如何将浮点值提取到单个1D numpy数组中？我想要的是这个：

[0.08606408, 0.26071976, 0.181566 ... 0.98252799]

提前致谢！

Answer 1

您可以连接内部数组：

peakpositions=np.concatenate(peakpositions)

演示：

>>> l= [[array([ 0.08606408]), array([ 0.26071976]),
       array([ 0.181566  ,  0.94154611]),
       array([ 0.1734347 ,  0.94160601]),
       array([ 0.17859844,  0.94167483]),
       array([ 0.16880761,  0.94156277]),
       array([ 0.17624151,  0.94149038]),
       array([ 0.18770433,  0.94181287]),
       array([ 0.16707977,  0.94227733]), array([ 0.94162233]),
       array([ 0.9426902,  0.9615621]), array([ 0.94195127,  0.96174422]),
       array([ 0.94237795,  0.96195226,  0.98059446]),
       array([ 0.94249657,  0.96219391,  0.98095329]),
       array([ 0.94280697,  0.96286183,  0.98109352]),
       array([ 0.94267473,  0.96304417,  0.98252799])]
>>> np.concatenate(l)
array([ 0.08606408,  0.26071976,  0.181566  ,  0.94154611,  0.1734347 ,
        0.94160601,  0.17859844,  0.94167483,  0.16880761,  0.94156277,
        0.17624151,  0.94149038,  0.18770433,  0.94181287,  0.16707977,
        0.94227733,  0.94162233,  0.9426902 ,  0.9615621 ,  0.94195127,
        0.96174422,  0.94237795,  0.96195226,  0.98059446,  0.94249657,
        0.96219391,  0.98095329,  0.94280697,  0.96286183,  0.98109352,
        0.94267473,  0.96304417,  0.98252799])
>>>

Answer 2

创建一个空列表/数组并对其进行扩展。

array_1d = []
for array in arrays:
    array_1d.extend(array)

那应该是神奇的。

Python：从列表数组中提取浮点值

2 个答案: