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how does multiplication differ for NumPy Matrix vs Array classes?
...NP.array(a2t)
>>> a1 * a2t
Traceback (most recent call last):
File "<pyshell#277>", line 1, in <module>
a1 * a2t
ValueError: operands could not be broadcast together with shapes (4,3) (3,4)
though using the NP.dot syntax works with arrays; this operations works like...
Where can I learn how to write C code to speed up slow R functions? [closed]
...cpp defines.
So a .Call function gets declared like this in some header file:
#include <Rcpp.h>
RcppExport SEXP foo( SEXP x1, SEXP x2 ) ;
and implemented like this in a .cpp file :
SEXP foo( SEXP x1, SEXP x2 ){
...
}
There is not much more to know about the R API to be using Rcp...
text-overflow:ellipsis in Firefox 4? (and FF5)
...cript using jQuery:
var limit = 50;
var ellipsis = "...";
if( $('#limitedWidthTextBox').val().length > limit) {
// -4 to include the ellipsis size and also since it is an index
var trimmedText = $('#limitedWidthTextBox').val().substring(0, limit - 4);
trimmedText += ellipsis;
$('#li...
windows service vs scheduled task
... Window Services for repititive maintenance tasks and applications such as file copying/synchronisations, bulk email sending, deletion or archiving of files, data correction (when other workarounds are not available).
For one project I have been involved in the development of 8 or 9 Windows Service...
Can enums be subclassed to add new elements?
...iving an enum from an interface is used by the Java 1.7 API, e.g. java.nio.file.Files.write() takes an array of OpenOption as the last argument. OpenOption is an interface, but when we call this function we usually pass a StandardOpenOption enum constant, which is derived from OpenOption. This has t...
LINQ .Any VS .Exists - What's the difference?
... so to eliminate any influence from generating test data I wrote it all to file and now read it from there.
private static void Test()
{
var list1 = File.ReadAllLines("test.txt").Take(500000).ToList();
var forceListEval = list1.SingleOrDefault(o => o == "0123456789012");
...
Valid to use (anchor tag) without href attribute?
...foo">).
The named anchor format is less commonly used, as the fragment identifier is now used to specify an [id] attribute (although for backwards compatibility you can still specify [name] attributes). An <a> element without an [href] attribute is still valid.
As far as semantics and sty...
Parse JSON in C#
...er.
Btw, if you're using the 3.5 Framework, you can just do this and avoid the backing fields, and let the compiler take care of that :
public string unescapedUrl { get; set;}
share
|
improve ...
Use latest version of Internet Explorer in the webbrowser control
...ation will change the registry. You may need to add a line in the Manifest File to avoid errors due to permissions of change in registry:
<requestedExecutionLevel level="highestAvailable" uiAccess="false" />
UPDATE 1
This is a class will get the latest version of IE on windows and make cha...
In-Place Radix Sort
...ber of buckets will approach your limits.
If you read the sequences from a file, instead of keeping them in memory, more memory would be available for buckets.
I think this would be faster than doing the sort in situ as the buckets are likely to fit within your working set.
Here is a hack that sho...