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Cluster analysis in R: determine the optimal number of clusters
...t;- Mclust(as.matrix(d), G=1:20)
m.best <- dim(d_clust$z)[2]
cat("model-based optimal number of clusters:", m.best, "\n")
# 4 clusters
plot(d_clust)
Five. Affinity propagation (AP) clustering, see http://dx.doi.org/10.1126/science.1136800
library(apcluster)
d.apclus <- apcluster(negDist...
How to call asynchronous method from synchronous method in C#?
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Asynchronous programming does "grow" through the code base. It has been compared to a zombie virus. The best solution is to allow it to grow, but sometimes that's not possible.
I have written a few types in my Nito.AsyncEx library for dealing with a partially-asynchronous code b...
How do you do a deep copy of an object in .NET? [duplicate]
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I wrote a deep object copy extension method, based on recursive "MemberwiseClone". It is fast (three times faster than BinaryFormatter), and it works with any object. You don't need a default constructor or serializable attributes.
Source code:
using System.Collection...
Apply CSS styles to an element depending on its child elements
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As far as I'm aware, styling a parent element based on the child element is not an available feature of CSS. You'll likely need scripting for this.
It'd be wonderful if you could do something like div[div.a] or div:containing[div.a] as you said, but this isn't possible....
Best practices to test protected methods with PHPUnit
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Good point. I actually use this method in my base class that I extend my test classes from, in which case this makes sense. The name of the class would be wrong here though.
– robert.egginton
Apr 4 '12 at 16:34
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Changing the selected option of an HTML Select element
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Test this Demo
Selecting Option based on its value
var vals = [2,'c'];
$('option').each(function(){
var $t = $(this);
for (var n=vals.length; n--; )
if ($t.val() == vals[n]){
$t.prop('selected', true);
return;
}
});
S...
Proper way to declare custom exceptions in modern Python?
...r(Exception):
def __init__(self, message, errors):
# Call the base class constructor with the parameters it needs
super(ValidationError, self).__init__(message)
# Now for your custom code...
self.errors = errors
That way you could pass dict of error messages t...
How can you represent inheritance in a database?
...'m thinking about how to represent a complex structure in a SQL Server database.
8 Answers
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Global and local variables in R
...erstanding how to use them:
http://stat.ethz.ch/R-manual/R-devel/library/base/html/environment.html
http://stat.ethz.ch/R-manual/R-devel/library/base/html/get.html
Here you have a small example:
test.env <- new.env()
assign('var', 100, envir=test.env)
# or simply
test.env$var <- 100
get...
How to install GCC piece by piece with GMP, MPFR, MPC, ELF, without shared libraries?
...m to install the support libraries in standard system location. For Debian based system including Ubuntu, Install libgmp-dev, libmpfr-dev and libmpc-dev packages. For RPM based system including Fedora and SUSE, install gmp-devel, and libmpc-devel(mpc-devel on SUSE) packages.
This option will instal...