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How to calculate a logistic sigmoid function in Python?
...s log1p.
In general, the multinomial logistic sigmoid is:
def nat_to_exp(q):
max_q = max(0.0, np.max(q))
rebased_q = q - max_q
return np.exp(rebased_q - np.logaddexp(-max_q, np.logaddexp.reduce(rebased_q)))
(However, logaddexp.reduce could be more accurate.)
...
Getting a structural type with an anonymous class's methods from a macro
...
This question is answered in duplicate by Travis here. There are links to the issue in the tracker and to Eugene's discussion (in the comments and mailing list).
In the famous "Skylla and Charybdis" section of the type checker, o...
Creating JS object with Object.create(null)?
...
They are not equivalent. {}.constructor.prototype == Object.prototype while Object.create(null) doesn't inherit from anything and thus has no properties at all.
In other words: A javascript object inherits from Object by default, unless y...
Absolute vs relative URLs
...L's, without the domain name. i.e. On StackOverflow use the absolute URL '/questions/2005079/absolute-vs-relative-urls' to link to this question. The '/' on the front makes the URL absolute. This approach pays off when you go to move your files around or change the directory structure of your projec...
“Uncaught Error: [$injector:unpr]” with angular after deployment
...ontroller;
angular.module("MyApp").controller("MyCtrl", function($scope, $q) {
// your code
})
The minification changes $scope and $q into random variables that doesn't tell angular what to inject. The solution is to declare your dependencies like this:
angular.module("MyApp")
.controller("M...
What does the number in parentheses shown after Unix command names in manpages mean?
...ample:
man 1 man
man 3 find
This is useful for when similar or exactly equal commands exist on different sections
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Convert file path to a file URI?
...rect. For example new Uri(@"C:\%51.txt").AbsoluteUri gives you "file:///C:/Q.txt" instead of "file:///C:/%2551.txt"
– poizan42
Mar 1 '16 at 20:57
3
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libpng warning: iCCP: known incorrect sRGB profile
...(directory), you can use mogrify from ImageMagick:
mogrify *.png
This requires that your ImageMagick was built with libpng16. You can easily check it by running:
convert -list format | grep PNG
If you'd like to find out which files need to be fixed instead of blindly processing all of them, yo...
Fastest way to list all primes below N
...veOfAtkin,
sieveOfEratosthenes,
sundaram3,
sieve_wheel_30,
ambi_sieve (requires numpy)
primesfrom3to (requires numpy)
primesfrom2to (requires numpy)
Many thanks to stephan for bringing sieve_wheel_30 to my attention.
Credit goes to Robert William Hanks for primesfrom2to, primesfrom3to, rwh_prime...
Deleting all pending tasks in celery / rabbitmq
...
For celery 3.0+:
$ celery purge
To purge a specific queue:
$ celery -Q queue_name purge
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