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numpy: most efficient frequency counts for unique values in an array
...ncount(x)
ii = np.nonzero(y)[0]
And then:
zip(ii,y[ii])
# [(1, 5), (2, 3), (5, 1), (25, 1)]
or:
np.vstack((ii,y[ii])).T
# array([[ 1, 5],
[ 2, 3],
[ 5, 1],
[25, 1]])
or however you want to combine the counts and the unique values.
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Useful GCC flags for C
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answered Jul 31 '10 at 1:35
cafcaf
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MySQL search and replace some text in a field
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88
UPDATE table_name
SET field = replace(field, 'string-to-find', 'string-that-will-replace-it');...
Create empty file using python [duplicate]
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ccpizza
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answered Sep 29 '12 at 17:25
ThiefMasterThiefM...
Detect when an image fails to load in Javascript
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edited Jun 3 '14 at 14:48
TehWan
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answe...
What is the source code of the “this” module doing?
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Michael J. BarberMichael J. Barber
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add a comm...
Wi-Fi 是什么的缩写 - 程序人生、谈天论地 - 清泛IT论坛，有思想、有深度
...是 Level 0，阅读本文前建议先搜索并查看相关资料学习 Wi-Fi 的基本概念，本文将不涉及定义或技术上的解释。Wi-Fi 是 Wireless Fidelity 吗一天和客户闲聊，我随口问了一句，Wi-Fi 是什么的缩写？客户是个美国人，他愣了一下，说自...
Is there a limit to the length of HTML attributes?
... ATTCNT 60 -- increased --
ATTSPLEN 65536 -- These are the largest values --
LITLEN 65536 -- permitted in the declaration --
NAMELEN 65536 -- Avoid fixed limits in actual --
PILEN 65536 -- impleme...
Git: “please tell me who you are” error
... luxuialuxuia
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How do I disable directory browsing?
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437
Create an .htaccess file containing the following line:
Options -Indexes
That is one option....