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Why does one hot encoding improve machine learning performance?
...ing is used on a particular data set (a matrix) and used as training data for learning algorithms, it gives significantly better results with respect to prediction accuracy, compared to using the original matrix itself as training data. How does this performance increase happen?
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How do I check if a number evaluates to infinity?
...inite returns false if your number is POSITIVE_INFINITY, NEGATIVE_INFINITY or NaN.
if (isFinite(result))
{
// ...
}
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Capitalize or change case of an NSString in Objective-C
...L" is UPPERCASE ➔ [NSString uppercaseString]
"April May" is Capitalized/Word Caps ➔ [NSString capitalizedString]
"April may" is Sentence caps ➔ (method missing; see workaround below)
Hence what you want is called "uppercase", not "capitalized". ;)
As for "Sentence Caps" one has to keep in mi...
How to trace the path in a Breadth-First Search?
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You should have look at http://en.wikipedia.org/wiki/Breadth-first_search first.
Below is a quick implementation, in which I used a list of list to represent the queue of paths.
# graph is in adjacent list representation
graph = {
'1': ['2', '3', '4'],
...
How to use git bisect?
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The idea behind git bisect is to perform a binary search in the history to find a particular regression. Imagine that you have the following development history:
... --- 0 --- 1 --- 2 --- 3 --- 4* --- 5 --- current
You know that your program is not working pr...
What are bitwise shift (bit-shift) operators and how do they work?
...languages (C#, Java, etc.) have the same concept (and often the same operators) ...
10 Answers
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In HTML5, should the main navigation be inside or outside the element?
In HTML5, I know that <nav> can be used either inside or outside the page's masthead <header> element. For websites having both secondary and main navigation, it seems common to include the secondary navigation as a <nav> element inside the masthead <header> element ...
When to use cla(), clf() or close() for clearing a plot in matplotlib?
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They all do different things, since matplotlib uses a hierarchical order in which a figure window contains a figure which may consist of many axes. Additionally, there are functions from the pyplot interface and there are methods on the Figure class. I will discuss both cases below.
pyplot ...
How can you determine a point is between two other points on a line segment?
...points (called a and b) on it represented by an x integer and a y integer for each point.
20 Answers
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Conditions for automatic generation of default/copy/move ctor and copy/move assignment operator?
I want to refresh my memory on the conditions under which a compiler typically auto generates a default constructor, copy constructor and assignment operator.
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