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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...也没有考虑重叠数对结果的影响，同样地，Mahout通过增加一个枚举类型（Weighting）的参数来使得重叠数也成为计算相似度的影响因子。
PearsonCorrelationSimilarity: 皮尔森相似度
原理：用来反映两个变量线性相关程度的统计量
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How to reset Android Studio
...
I only know how to do this on Windows (but it should be similar on any OS, you will just need to find the correct location yourself - google search would help with that).
On Windows:
Go to your User Folder - on Windows 7/8 this would be:
[SYSDRIVE]:\Users\[your username] (ex. C:\Users\Joh...
How to repeat last command in python interpreter shell?
...n startup file
import readline
import rlcompleter
import atexit
import os
# tab completion
readline.parse_and_bind('tab: complete')
# history file
histfile = os.path.join(os.environ['HOME'], '.pythonhistory')
try:
readline.read_history_file(histfile)
except IOError:
pass
atexit....
How to set gradle home while importing existing project in Android studio
...om Android Studio that is not the right folder.
– lagos
Sep 30 '14 at 7:56
9
the directory in thi...
How to automate createsuperuser on django?
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This should be the most upvoted (and accepted) answer.
– bruno desthuilliers
Oct 20 '17 at 10:19
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(Mac) -bash: __git_ps1: command not found
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On OSX 10.9 with git 1.8.5.3 installed via Homebrew, both git-prompt.sh and git-completion.bash are found in `brew --prefix git`/etc/bash_completion.d/.
– dokkaebi
Feb 10 '14 at 22:02
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What is the “FS”/“GS” register intended for?
So I know what the following registers and their uses are supposed to be:
5 Answers
5
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Python glob multiple filetypes
...ver match patterns and keep the join inside the loop for simplicity:
from os.path import join
from glob import glob
files = []
for ext in ('*.gif', '*.png', '*.jpg'):
files.extend(glob(join("path/to/dir", ext)))
print(files)
...
How to fix java.net.SocketException: Broken pipe?
I am using apache commons http client to call url using post method to post the parameters and it is throwing the below error rarely.
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Programmatically find the number of cores on a machine
...);
int numCPU = sysinfo.dwNumberOfProcessors;
Linux, Solaris, AIX and Mac OS X >=10.4 (i.e. Tiger onwards)
int numCPU = sysconf(_SC_NPROCESSORS_ONLN);
FreeBSD, MacOS X, NetBSD, OpenBSD, etc.
int mib[4];
int numCPU;
std::size_t len = sizeof(numCPU);
/* set the mib for hw.ncpu */
mib[0] = CTL...