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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...
How to set the current working directory? [duplicate]
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edited Feb 13 '13 at 10:43
Alex L
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answered ...
How do I make an http request using cookies on Android?
...her valid or not?
– Praveen
Sep 23 '10 at 11:36
THANK YOU for introducing me to BasicNameValuePairs. They helped me.
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JNI converting jstring to char *
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answered Nov 15 '10 at 6:35
Jason RogersJason Rogers
18.4k2424 gold badges7171 silver badges110110 bronze badges
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Splitting templated C++ classes into .hpp/.cpp files--is it possible?
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answered Jan 26 '10 at 23:52
Sharjith N.Sharjith N.
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How to return result of a SELECT inside a function in PostgreSQL?
... -- column alias only visible inside
, (count(*) * 100) / _max_tokens -- I added brackets
FROM (
SELECT t.txt
FROM token t
WHERE t.chartype = 'ALPHABETIC'
LIMIT _max_tokens
) t
GROUP BY t.txt
ORDER BY cnt DESC; ...
Automatically add newline at end of curl response body
...the weird characters.
– jcollum
Aug 10 '17 at 20:57
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How to round float numbers in javascript?
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var number = 6.688689;
var roundedNumber = Math.round(number * 10) / 10;
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