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How to split data into training/testing sets using sample function
I've just started using R and I'm not sure how to incorporate my dataset with the following sample code:
23 Answers
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What is the difference between '/' and '//' when used for division?
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In Python 3.x, 5 / 2 will return 2.5 and 5 // 2 will return 2. The former is floating point division, and the latter is floor division, sometimes also called integer division.
In Python 2.2 or later in the 2.x line, there is no difference for integers unless y...
Recursive sub folder search and return files in a list python
...m working on a script to recursively go through subfolders in a mainfolder and build a list off a certain file type. I am having an issue with the script. Its currently set as follows
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What is event bubbling and capturing?
What is the difference between event bubbling and capturing? When should one use bubbling vs capturing?
6 Answers
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Debugging in Clojure? [closed]
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There's also dotrace, which allows you to look at the inputs and outputs of selected functions.
(use 'clojure.contrib.trace)
(defn fib[n] (if (< n 2) n (+ (fib (- n 1)) (fib (- n 2)))))
(dotrace [fib] (fib 3))
produces the output:
TRACE t4425: (fib 3)
TRACE t4426: | (fib 2)
T...
Getting the first character of a string with $str[0]
I want to get the first letter of a string and I've noticed that $str[0] works great. I am just not sure whether this is 'good practice', as that notation is generally used with arrays. This feature doesn't seem to be very well documented so I'm turning to you guys to tell me if it's all right –...
Removing an element from an Array (Java) [duplicate]
Is there any fast (and nice looking) way to remove an element from an array in Java?
15 Answers
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iPhone app signing: A valid signing identity matching this profile could not be found in your keycha
...r every invalid provisioning profile have a button "Renew". After renewing and downloading updated provisioning profile all seems to work as expected, so problem is definitely solved :)
Update: you may have to contact Apple to get a "Renew"-button, or they removed it -- and the solution is to just ...
Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
I need some code samples (and I also really curious about them) of Scala and Java code which show that Scala code is more simple and concise then code written in Java (of course both samples should solve the same problem).
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Should one use < or
...!= instead? I'd say that that most clearly establishes i as a loop counter and nothing else.
– yungchin
Feb 12 '09 at 2:59
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