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Difference between classification and clustering in data mining? [closed]
Can someone explain what the difference is between classification and clustering in data mining?
21 Answers
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扩展App Inventor：具有多点触控和手势检测功能 · App Inventor 2 中文网
...Massachusetts Avenue, Cambridge, MA 02139, USA
ABSTRACT
MIT App Inventor is a block-based event-driven programming tool that allows everyone, especially novices, to start programming and building fully functional apps for Android devices. Compared to traditional text programming with Android Studi...
django MultiValueDictKeyError error, how do I deal with it
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Use the MultiValueDict's get method. This is also present on standard dicts and is a way to fetch a value while providing a default if it does not exist.
is_private = request.POST.get('is_private', False)
Generally,
my_var = dict.get(<key>, <default&g...
Is Ruby pass by reference or by value?
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In traditional terminology, Ruby is strictly pass-by-value. But that's not really what you're asking here.
Ruby doesn't have any concept of a pure, non-reference value, so you certainly can't pass one to a method. Variables are always references to objects....
How is AngularJS different from jQuery
I only know one js library and that is jQuery .
But my other coders in the group are changing AngularJS as their default library in new project.
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how to calculate binary search complexity
... say that since binary search halves the input required to search hence it is log(n) algorithm. Since I am not from a mathematics background I am not able to relate to it. Can somebody explain it in a little more detail? does it have to do something with the logarithmic series?
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How is the fork/join framework better than a thread pool?
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I think the basic misunderstanding is, that the Fork/Join examples do NOT show work stealing but only some kind of standard divide and conquer.
Work stealing would be like this: Worker B has finished his work. He is a kind one, so he looks ar...
What does `kill -0 $pid` in a shell script do?
... the signal 0 to a given PID just checks if any process with the given PID is running and you have the permission to send a signal to it.
For more information see the following manpages:
kill(1)
$ man 1 kill
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If sig is 0, then no signal is sent, but error checking is still performed.
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kil...
What is ANSI format?
What is ANSI encoding format? Is it a system default format?
In what way does it differ from ASCII?
10 Answers
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Is Big O(logn) log base e?
For binary search tree type of data structures, I see the Big O notation is typically noted as O(logn). With a lowercase 'l' in log, does this imply log base e (n) as described by the natural logarithm? Sorry for the simple question but I've always had trouble distinguishing between the different...