ln

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Using numpy, how can I do the following: ln(x) Is it equivalent to: np.log(x) I apologise for such a seemingly trivial question, but my understanding of the difference between log and ln is that ln is logspace e? 回答1: np.log is ln , whereas np.log10 is your standard base 10 log. Relevant documentation: http://docs.scipy.org/doc/numpy/reference/generated/numpy.log.html http://docs.scipy.org/doc/numpy/reference/generated/numpy.log10.html 回答2: Correct, np.log(x) is the Natural Log (base e log) of x . For other bases, remember this law of logs:

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: Having loads of difficulty getting this set up. I've fixed up my .bash_profile , created the symlink using the following command from the sublime website: ln -s "/Applications/Sublime Text 2.app/Contents/SharedSupport/bin/subl" ~/bin/subl Yet when I input that command I get: ln: /Users/my_username/bin/subl: No such file or directory It appears my terminal is looking at the wrong place for the file? Why is it trying to point to a bin folder on my home directory? 回答1: create the symlink in /usr/local/bin instead of ~/bin and make sure that

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: When I try to create a symbolic link from the Git Bash shell, it fails every time all the time: $ ln -s /c/Users/bzisad0/Work testlink ln: creating symbolic link `testlink' to `/c/Users/bzisad0/Work': Permission denied The only thing it does, besides give the error message, is create an empty directory named (in this case) testlink . I don't see any problem with the ln executable. For instance, it is owned by me and marked as executable: $ which ln /bin/ln $ ls -hal /bin/ln -rwxr-xr-x 1 BZISAD0 Administ 71k Sep 5 11:55 /bin/ln I also own the

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I want to make a symbolic link in Linux. I have written this bash command where the first path is the folder I want link into and the second path is the compiled source. ln -s '+basebuild+'/IpDome-kernel/kernel /home/build/sandbox/gen2/basebuild/IpDome-kernel/kernal Is this correct? 回答1: To create a new symlink (will fail if symlink exists already): ln -s /path/to/file /path/to/symlink To create or update a symlink: ln -sf /path/to/file /path/to/symlink 回答2: ln -s TARGET LINK_NAME Where the -s makes it symbolic. 回答3: ln -s EXISTING_FILE_OR

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 由 翻译 强力驱动 问题: I'm attempting to install an up to date version of ffmpeg on an elastic beanstalk instance on amazon servers. I've created my config file and added these container_commands: container_commands : 01 - ffmpeg : command : wget - O / usr / local / bin / ffmpeg http : //ffmpeg.gusari.org/static/64bit/ffmpeg.static.64bit.2014-03-05.tar.gz leader_only : false 02 - ffmpeg : command : tar - xzf / usr / local / bin / ffmpeg leader_only : false 03 - ffmpeg : command : ln - s / usr / local / bin / ffmpeg / usr / bin / ffmpeg leader_only :

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: All, i am using RowGrouping on Data table,For each Group i need to do Subtotal on some of columns(Encum,Paid,Balance) and Total on All the row for Column(Encum,Paid,Balance). i am quite new to this Datatable and not able to achieve the result what i needed. Here is the code is have used. i need to display $value of 3 of those column and also do subtotal at the header. Please help me out here, code in jsfiddle: jsfiddle.net/6r2pjbg8 回答1: Does this work for you? var POdata = [{ "PO_Nbr": "3000202173", "FY": 2015, "LN": "1.1", "FOA": "2500

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I used polyfit to find a fitline of a data set, but now I need to find the natural log of that fitline function and plot it. Here's what I have so far: #Fit line for PD deg = 10 zn = np.polyfit(l_bins, l_hits, deg) l_pn = np.poly1d(zn) pylab.plot(l_bins, l_pn(l_bins), '-g') ln_list = [] for all in l_bins: ln_list.append(np.log(l_pn(all))) pylab.plot(l_bins, ln_list, '-b') Is there a better or more correct way to do this? 回答1: Edit I would suggest using numpy.log as Roger Fan demonstrated below. Since you are already using numpy arrays, this

可以将文章内容翻译成中文,广告屏蔽插件可能会导致该功能失效(如失效，请关闭广告屏蔽插件后再试): 问题: I have a data frame with 5 variables: Lot / Wafer / Serial Number / Voltage / Amplification. In this data frame there are 1020 subsets grouped by Serial_number. Each subset has a certain number of measurement data points (Amplification against voltage). I fit the data with summary(fit2.lme <- lmer(log(log(Amplification)) ~ poly(Voltage, 3) + (poly(Voltage, 1) | Serial_number), + data = APD)) which yields: Linear mixed model fit by REML ['lmerMod'] Formula: log(log(Amplification)) ~ poly(Voltage, 3) + (poly(Voltage, 1) | Serial_number) Data:

<Codeforces 990C> 题意： 给n个只由 '(' 和 ')' 组成的串，问从这些串中选出两个串，使他们括号匹配，能够成多少个匹配串，自身和自身组合匹配也算。以题中第二个样例说明： 输入：2 ( ) ( ) 输出：4 解释：输入的两个串 a，b 分别是 a: ( )，b: ( )，所以共四种连接方式，即 a->a，a->b，b->a，b->b 思路： 说实话，这个思路，就是一种只可意会不可言传的感觉，我大概用我拙劣的语言，表述一下 T^T 我先对每个输入进来的串，进行如下操作： int ln = s . length (); for ( int j = 0 ; j < ln ; j ++) { if ( s [ j ] == '(' ) l ++; else { if ( l ) l --; else r ++; } } 这里的 l 代表，在输入进来的这个串中，不能与自身右括号形成匹配的左括号的个数； r 则代表，在输入进来的这个串中，不能与自身左括号形成匹配的右括号的个数。 我已经进我最大努力表述了，自行脑补一下这里有一个笑哭的表情。。。注意听~ 这样每个串无法在自身形成匹配的左右括号数就分别找出来了。 然后进行如下两步操作： if (! l ) R [ r ]++; if (! r ) L [ l ]++; 以上两步是核心代码，我尽我最大努力解释清楚， 首先明确两点

sudo apt-get install python 安装Chromedriver: https://sites.google.com/a/chromium.org/chromedriver/downloads sudo apt-get install unzip wget -N http://chromedriver.storage.googleapis.com/2.28/chromedriver_linux64.zip -P ~/Downloads unzip ~/Downloads/chromedriver_linux64.zip-d ~/Downloads chmod +x ~/Downloads/chromedriver sudo mv -f ~/Downloads/chromedriver/usr/local/share/chromedriver sudo ln -s /usr/local/share/chromedriver/usr/local/bin/chromedriver sudo ln -s /usr/local/share/chromedriver /usr/bin/chromedriver 文章来源: ubuntu 安装selenium+Chromedriver