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Cluster analysis in R: determine the optimal number of clusters
...y = unlist(lapply(1:g, function(i) rnorm(n/g, runif(1)*i^2))))
plot(d)
One. 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 resultin...
How can I split a JavaScript string by white space or comma?
...on:
input.split(/[ ,]+/);
This particular regex splits on a sequence of one or more commas or spaces, so that e.g. multiple consecutive spaces or a comma+space sequence do not produce empty elements in the results.
share
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NULL values inside NOT IN clause
...n I got different records counts for what I thought were identical queries one using a not in where constraint and the other a left join . The table in the not in constraint had one null value (bad data) which caused that query to return a count of 0 records. I sort of understand why but I co...
Embedding JavaScript engine into .NET [closed]
just wondering if anyone has ever tried embedding and actually integrating any js engine into the .net environment. I could find and actually use (after a LOT of pain and effort, since it's pretty outdated and not quite finished) spidermonkey-dotnet project. Anyone with experience in this area? En...
Transposing a 2D-array in JavaScript
... If you use it twice on the same array, it comes back to the first one intead of rotating 90' again
– Olivier Pons
Mar 3 '17 at 13:51
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How to decide when to use Node.js?
...ould create immense load on the server, because each active client eats up one server process. This situation amounts to a tarpit attack. When you use something like Node.js, the server has no need of maintaining separate threads for each open connection.
This means you can create a browser-based...
FragmentPagerAdapter getItem is not called
... question as I am doing a very silly mistake but this answer will help someone who is facing the same problem that Instead of FragmentPagerAdapter, use FragmentStatePagerAdapter.
As @BlackHatSamurai mentioned in the comment:
The reason this works is because FragmentStatePagerAdapter destroys
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What are the most-used vim commands/keypresses?
...'A' for appending text at the end of the line, or…" I can't imagine everyone uses all 20 different keypresses to navigate text, 10 or so keys to start adding text, and 18 ways to visually select an inner block. Or do you!?
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JavaScript dependency management: npm vs. bower vs. volo [closed]
...manages JavaScript modules called packages and Bower manages front-end components (i.e. css, html, and JavaScript) called components. npm is also used to install bower. Here is an expansive article on npm and bower (does not cover volo) it goes into plenty of detail.
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How to import a module given its name as string?
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One problem with this solution for the OP is that trapping exceptions for one or two bad "command" modules makes his/her whole command-app fail on one exception. Personally I'd for loop over each import individually wrapped i...