Don Reba

Spain

Age: 31

Representative of the Holy Order in the Arkanarian Province. Bishop and Councilor of War, servant of Our Lord!

http://careers.stackoverflow.com/alexey-badalov

17h
answered Access any position in C++ empty string
17h
comment Access any position in C++ empty string
It could return empty, but it could also format your hard drive.
1d
comment Is it possible to use AI to classify different apps and websites by functionality?
If it's possible with natural intelligence, why wouldn't it be possible with artificial?
1d
answered Is dimensionality reduction reversible?
2d
accepted Diagonally dominant matrix — geometric interpretation
2d
revised Diagonally dominant matrix — geometric interpretation
added 126 characters in body
Jun
29
answered Diagonally dominant matrix — geometric interpretation
Jun
27
comment Diagonally dominant matrix — geometric interpretation
The meaning of "more" is key here, then. If I decompose the matrix into the diagonal matrix and "noise," the noise matrix will be the original with each row divided by the corresponding diagonal entry. The definition tells us that the absolute values of each row of this noise matrix sum up to no more than 2. I'm not sure what that implies.
Jun
27
asked Diagonally dominant matrix — geometric interpretation
Jun
15
comment How convert unsigned int to unsigned char array
@Lundin, you're right. Thanks.
Jun
15
comment How convert unsigned int to unsigned char array
@Lundin, no, it really depends on what you are trying to achieve. If you want to see the layout in memory, for example, then casting is the right thing to do. Let's not be dogmatic.
Jun
15
comment How convert unsigned int to unsigned char array
@girl71, this function was added in C++11. If you are using gcc, it needs the -std=c++11 flag. Maybe Eclipse has an option for this. Before C++11 you would use std::copy or memcpy for this.
Jun
15
comment How convert unsigned int to unsigned char array
@mch Good point. I'll add this to the answer.
Jun
15
revised How convert unsigned int to unsigned char array
added 102 characters in body
Jun
15
answered How convert unsigned int to unsigned char array
Jun
12
comment Why does classifier accuracy drop after PCA, even though 99% of the total variance is covered?
And even keeping 100% of the variance after PCA may ruin the classifier, since some classifiers, such as decision trees, are sensitive to dataset rotation.
Jun
11
comment Why does classifier accuracy drop after PCA, even though 99% of the total variance is covered?
Which classifier?
Jun
9
answered Can reinforcement learning be used for a complete coverage navigation application?
Jun
8
answered How object cout prints multiple arguments?
Jun
8
answered Why would down casting be a bad practice in C++ and not in another language?
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