獲取最大陣列

-1

列表的一列。如果我有numpy的ordered dictionary陣列獲取最大陣列

from collections import OrderedDict 

>>> bias 
OrderedDict([('bias_0.0', array([[ -4.76624398e-04, 4.49229230e-03, 1.70000000e+01], 
     [ -1.55963349e-03, 1.43121798e-03, 1.80000000e+01], 
     [ 1.83762370e-03, 1.15303340e-03, 1.90000000e+01], 
     [ 3.11141924e-03, 7.94052356e-04, 2.00000000e+01], 
     [ -1.45957877e-04, 9.43913508e-04, 2.10000000e+01], 
     [ -2.81545419e-04, 9.63629400e-04, 2.20000000e+01], 
     [ 8.18959167e-04, 9.94954147e-04, 2.30000000e+01], 
     [ 2.83641949e-03, 1.30510580e-03, 2.40000000e+01]])), ('bias_0.5', array([[ -4.76624398e-04, 4.49229230e-03, 1.70000000e+01], 
     [ -1.55963349e-03, 1.43121798e-03, 1.80000000e+01], 
     [ 1.83762370e-03, 1.15303340e-03, 1.90000000e+01], 
     [ 3.11141924e-03, 7.94052356e-04, 2.00000000e+01], 
     [ -1.45957877e-04, 9.43913508e-04, 2.10000000e+01], 
     [ -2.37881094e-04, 9.59085284e-04, 2.20000000e+01], 
     [ 3.66215090e-03, 9.91373349e-04, 2.30000000e+01], 
     [ 1.34585904e-02, 1.43382398e-03, 2.40000000e+01]])), ('bias_0.7', array([[ -4.76624398e-04, 4.49229230e-03, 1.70000000e+01], 
     [ -1.55963349e-03, 1.43121798e-03, 1.80000000e+01], 
     [ 1.83762370e-03, 1.15303340e-03, 1.90000000e+01], 
     [ 3.11138346e-03, 7.94066088e-04, 2.00000000e+01], 
     [ -1.42918871e-04, 9.43977120e-04, 2.10000000e+01], 
     [ 1.22558682e-04, 9.78267596e-04, 2.20000000e+01], 
     [ 7.97667211e-03, 1.05694380e-03, 2.30000000e+01], 
     [ 1.72989414e-02, 1.60985477e-03, 2.40000000e+01]])), ('bias_0.9', array([[ -4.76624398e-04, 4.49229230e-03, 1.70000000e+01], 
     [ -1.55963349e-03, 1.43121798e-03, 1.80000000e+01], 
     [ 1.83762370e-03, 1.15303340e-03, 1.90000000e+01], 
     [ 3.11163249e-03, 7.93727126e-04, 2.00000000e+01], 
     [ -1.59545890e-05, 9.47506839e-04, 2.10000000e+01], 
     [ 3.09800829e-03, 9.76612289e-04, 2.20000000e+01], 
     [ 8.85488891e-03, 8.91245114e-04, 2.30000000e+01], 
     [ 8.39106167e-03, 9.21750885e-03, 2.40000000e+01]])), ('bias_0.95', array([[ -4.76624398e-04, 4.49229230e-03, 1.70000000e+01], 
     [ -1.55963349e-03, 1.43121798e-03, 1.80000000e+01], 
     [ 1.83848596e-03, 1.15319035e-03, 1.90000000e+01], 
     [ 3.11342300e-03, 7.93791443e-04, 2.00000000e+01], 
     [ 4.05623641e-04, 9.67667341e-04, 2.10000000e+01], 
     [ 1.13983053e-03, 8.23258801e-04, 2.20000000e+01], 
     [ -4.42620841e-03, 1.09573777e-03, 2.30000000e+01], 
     [ -1.98968147e-03, 1.03812656e-02, 2.40000000e+01]]))])

我怎麼能拿第一列中的所有陣列的最大價值？

來源

2014-09-30 Dalek

你可以使用列表中理解，使每個陣列的第一列中的最大值在bias列表：

>>> [np.max(arr[:,0]) for arr in bias.values()] 
[0.0031114192400000002, 
0.0134585904, 
0.0172989414, 
0.0088548889100000007, 
0.0031134230000000001]

如果你需要找到最大值的這個列表中的最大值，您可以使用內置功能max。

來源

2014-09-30 21:06:20

我可以糾正我的問題嗎？ – Dalek 2014-09-30 21:09:00

當然 - 如果我不正確地解釋它，表示歉意。 – 2014-09-30 21:09:22

您可以擴展他的解決方案。我假設你有多個'b's。只需將所有數組的最大值加載到列表中，並找到列表中最大的值。 – 2014-09-30 21:10:17

我會假設你想每個陣列一個最大值，仍然歸屬於相同的密鑰的原始OrderedDict。你可能會說

maximumValues = OrderedDict([ (eachKey, eachArray[:,0].max()) for eachKey, eachArray in bias.items() ])

來源

2014-09-30 21:12:18 jez

獲取最大陣列

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