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SignalR: Why choose Hub vs. Persistent Connection?
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answered Feb 14 '12 at 17:10
Frank van PuffelenFrank van Puffelen
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Standardize data columns in R
... function on the data to do what you want.
dat <- data.frame(x = rnorm(10, 30, .2), y = runif(10, 3, 5))
scaled.dat <- scale(dat)
# check that we get mean of 0 and sd of 1
colMeans(scaled.dat) # faster version of apply(scaled.dat, 2, mean)
apply(scaled.dat, 2, sd)
Using built in functions...
HTML5 doctype putting IE9 into quirks mode?
...dIan Boyd
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Is there StartsWith or Contains in t sql with variables?
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Kirill PolishchukKirill Polishchuk
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How to cast int to enum in C++?
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MSDN: The static_cast operator can explicitly convert an integral value to an enumeration type. If the value of the integral type does not ...
Passing arguments to require (when loading module)
...477/…
– SadSeven
Jul 19 '16 at 11:10
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So what happens if you reference the module several time...
Is there a timeout for idle PostgreSQL connections?
...HERE
current_query = '<IDLE>'
AND
now() - query_start > '00:10:00';
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Why were pandas merges in python faster than data.table merges in R in 2012?
...n issue in data.table when the number of unique strings (levels) is large: 10,000.
Does Rprof() reveal most of the time spent in the call sortedmatch(levels(i[[lc]]), levels(x[[rc]])? This isn't really the join itself (the algorithm), but a preliminary step.
Recent efforts have gone into allowing...
How do I enable gzip compression when using MVC3 on IIS7?
...rrectly.
– Akash Kava
Sep 11 '14 at 10:29
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What are the “loose objects” that the Git GUI refers to?
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An object (blobs, trees, and commits) with SHA say - 810cae53e0f622d6804f063c04a83dbc3a11b7ca will be stored at
.git/objects/81/0cae53e0f622d6804f063c04a83dbc3a11b7ca
( the split in first two characters to improve performance of the File system as now not all the objects are ...