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Cluster analysis in R: determine the optimal number of clusters
...Look for a bend or elbow in the sum of squared error (SSE) scree plot. See http://www.statmethods.net/advstats/cluster.html & http://www.mattpeeples.net/kmeans.html for more. The location of the elbow in the resulting plot suggests a suitable number of clusters for the kmeans:
mydata <- d
ws...
Throwing cats out of windows
...y is 210 km/h (130mph).[=75m/s = 68.58 yards/s]
Terminal velocity source:
http://en.wikipedia.org/wiki/Cat_righting_reflex
Credits:
Goooooogle
I need to verify later:
http://en.wikipedia.org/wiki/Terminal_velocity
http://www.grc.nasa.gov/WWW/K-12/airplane/termv.html
...
Java: function for arrays like PHP's join()?
....stream(a).collect(Collectors.joining(", "));
2) new String.join method: https://stackoverflow.com/a/21756398/466677
3) java.util.StringJoiner class: http://docs.oracle.com/javase/8/docs/api/java/util/StringJoiner.html
s...
How to convert all text to lowercase in Vim
...o" with gu then a movement.
For examples and more info please read this:
http://vim.wikia.com/wiki/Switching_case_of_characters
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Escape double quotes in parameter
...eUploader: {
brandingHtml: "Powered by \u003ca href=\"https://imgur.com/\"\u003e\u003csvg class=\"svg-icon\" width=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 4...
Why won't my PHP app send a 404 error?
...
if (strstr($_SERVER['REQUEST_URI'],'index.php')){
header('HTTP/1.0 404 Not Found');
echo "<h1>404 Not Found</h1>";
echo "The page that you have requested could not be found.";
exit();
}
If you look at the last two echo lines, that's where you'll see the con...
.NET - Get protocol, host, and port
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The following (C#) code should do the trick
Uri uri = new Uri("http://www.mywebsite.com:80/pages/page1.aspx");
string requested = uri.Scheme + Uri.SchemeDelimiter + uri.Host + ":" + uri.Port;
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How do I put an already-running process under nohup?
....
Issue:
% jobs
[1] running java
[2] suspended vi
% disown %1
See http://www.quantprinciple.com/invest/index.php/docs/tipsandtricks/unix/jobcontrol/
for a more detailed discussion of Unix Job Control.
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How do you clone a Git repository into a specific folder?
...your case this would be something like:
ln -sfn /opt/projectA/prod/public /httpdocs/public
Which easily could be changed to test if you wanted it, i.e.:
ln -sfn /opt/projectA/test/public /httpdocs/public
without moving files around. Added -fn in case someone is copying these lines (-f is force, -...
CSS Pseudo-classes with inline styles
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Rather than needing inline you could use Internal CSS
<a href="http://www.google.com" style="hover:text-decoration:none;">Google</a>
You could have:
<a href="http://www.google.com" id="gLink">Google</a>
<style>
#gLink:hover {
text-decoration: none;
...