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Standardize data columns in R
...cale function on the data to do what you want.
dat <- data.frame(x = rnorm(10, 30, .2), y = runif(10, 3, 5))
scaled.dat <- scale(dat)
# check that we get mean of 0 and sd of 1
colMeans(scaled.dat) # faster version of apply(scaled.dat, 2, mean)
apply(scaled.dat, 2, sd)
Using built in funct...
ERROR 1396 (HY000): Operation CREATE USER failed for 'jack'@'localhost'
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Try doing a FLUSH PRIVILEGES;. This MySQL bug post on that error code appears to report some success in a case similar to yours after flushing privs.
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How can I get around MySQL Errcode 13 with SELECT INTO OUTFILE?
...er Edition?
Recent Ubuntu Server Editions (such as 10.04) ship with AppArmor and MySQL's profile might be in enforcing mode by default. You can check this by executing sudo aa-status like so:
# sudo aa-status
5 profiles are loaded.
5 profiles are in enforce mode.
/usr/lib/connman/scripts/dhclie...
clang error: unknown argument: '-mno-fused-madd' (python package installation failure)
I get the following error when attempting to install psycopg2 via pip on Mavericks 10.9:
14 Answers
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How to force 'cp' to overwrite directory instead of creating another one inside?
I'm trying to write a Bash script that will overwrite an existing directory. I have a directory foo/ and I am trying to overwrite bar/ with it. But when I do this:
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How to configure socket connect timeout
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I found this. Simpler than the accepted answer, and works with .NET v2
Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
// Connect using a timeout (5 seconds)
IAsyncResult result = socket.BeginConnect( sIP, iPort, null, null );
bo...
MVC Razor dynamic model, 'object' does not contain definition for 'PropertyName'
Using MVC 3 with Razor view engine.
I have this View:
8 Answers
8
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configure Git to accept a particular self-signed server certificate for a particular https remote
The sysadmin for a project I'm on has decided that SSH is "too much trouble"; instead, he has set up Git to be accessible via an https:// URL (and username/password authentication). The server for this URL presents a self-signed certificate, so he advised everyone to turn off certificate validatio...
Controlling maven final name of jar artifact
...ty in the plugin configuration section:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<finalName>myJar</finalName> ...
JavaScript, Node.js: is Array.forEach asynchronous?
I have a question regarding the native Array.forEach implementation of JavaScript: Does it behave asynchronously?
For example, if I call:
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