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How to split/partition a dataset into training and test datasets for, e.g., cross validation?
...k of the indices:
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
numpy.random.shuffle(x)
training, test = x[:80,:], x[80:,:]
or
import numpy
# x is your dataset
x = numpy.random.rand(100, 5)
indices = numpy.random.permutation(x.shape[0])
training_idx, test_idx = indices[:80], ind...
New line in Sql Query
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Pinal Dave explains this well in his blog.
http://blog.sqlauthority.com/2009/07/01/sql-server-difference-between-line-feed-n-and-carriage-return-r-t-sql-new-line-char/
DECLARE @NewLineChar AS CHAR(2) = CHAR(13) + CHAR(10)
PRINT ('SELECT FirstLine AS FL ' + @NewLineChar + 'SELECT SecondLine AS SL'...
String replacement in Objective-C
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edited Mar 20 '09 at 22:45
answered Mar 20 '09 at 22:39
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Single Line Nested For Loops
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Anthony Geoghegan
9,51244 gold badges4040 silver badges4848 bronze badges
answered Jun 9 '13 at 5:26
Jeff TratnerJeff Tratner
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Repeatedly run a shell command until it fails?
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edited Nov 8 '19 at 0:10
Gurpreet Atwal
7366 bronze badges
answered Oct 19 '12 at 4:09
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How does variable assignment work in JavaScript?
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edited Aug 11 '18 at 14:50
Volker E.
5,1821111 gold badges4141 silver badges6262 bronze badges
answered...
Sample settings.xml for maven
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190
Here's the stock "settings.xml" with comments (complete/unchopped file at the bottom)
License:
&...
What is the difference between build.sbt and build.scala?
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To give a brief example, this build.sbt:
name := "hello"
version := "1.0"
is a shorthand notation roughly equivalent to this project/Build.scala:
import sbt._
import Keys._
object Build extends Build {
lazy val root = Project(id = "root", base = file(".")).settings(
name := "hello",
...
Java `final` method: what does it promise?
...ss is a good example.
public class Counter {
private int counter = 0;
public final int count() {
return counter++;
}
public final int reset() {
return (counter = 0);
}
}
If the public final int count() method is not final, we can do something like this:
C...
What's with 181783497276652981 and 8682522807148012 in Random (Java 7)?
Why were 181783497276652981 and 8682522807148012 chosen in Random.java ?
3 Answers
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