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Standardize data columns in R
...j <- preProcess(data[, -10], method=c("center", "scale"))
newData <- predict(preObj, data[, -10])
More details: http://www.inside-r.org/node/86978
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Ruby on Rails vs ASP.NET MVC 3 for a .NET Guy? [closed]
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Ruby versioning is simple and predictable if you use Bundler, as you should be.
– Lilith River
Nov 18 '12 at 2:10
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Why not use always android:configChanges=“keyboardHidden|orientation”?
...s. The thing about Android is it is an open platform and you really can't predict the hardware configuration or what the user will want to do with it, so you should probably support both (all) orientations just in case.
– Tevo D
Nov 1 '11 at 18:45
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Could someone explain the pros of deleting (or keeping) unused code?
...uture, but we can't know enough today about tomorrow's needs to be able to predict that with any kind of reliability. To think otherwise is arrogance tending toward hubris. What we can know about tomorrow is: we want our code base to be easy to modify, and unused code detracts from that characteri...
Why is Go so slow (compared to Java)?
...feature. Moving things out of the way without removing them entirely (e.g. predicting virtual call destinations in JIT-compiled Java) starts to get tricky.
FWIW, my own very trivial test with Go when I was taking a look at it (a loop of integer addition, basically), gccgo produced code towards the ...
input type=“submit” Vs button tag are they interchangeable?
...uirks in which input[type="submit"] do not display correctly in some cases
Predictable requests: IE has verying behaviours when values are submitted in the POST/GET request to the server
Markup-friendly; you can nest items, for example, icons, inside the button.
HTML5, forward-thinking; as developer...
Multiple linear regression in Python
... Just noticed that your x1, x2, x3 are in reverse order in your original predictor list, i.e., x = [x3, x2, x1]?
– sophiadw
Apr 22 '16 at 3:27
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Why does Dijkstra's algorithm use decrease-key?
... decrease-key operations tends to be much smaller than what the worst case predicts.
For similar reasons, a heap that doesn't have to support a decrease-key operation, has even less constant factors and actually performs best. Especially if the graph is sparse.
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What's the longest possible worldwide phone number I should consider in SQL varchar(length) for phon
...ur particular database. SQL Server, for example, loses a lot of ability to predict data page sizes and optimize accesses and alignment thusly. As always, test.
– Matt Enright
Aug 10 '11 at 22:09
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Once upon a time, when > was faster than < … Wait, what?
... hardware, and is pipelined - there is no speculation and hence, no branch prediction.
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