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How to drop columns by name in a data frame
...exing or the subset function. For example :
R> df <- data.frame(x=1:5, y=2:6, z=3:7, u=4:8)
R> df
x y z u
1 1 2 3 4
2 2 3 4 5
3 3 4 5 6
4 4 5 6 7
5 5 6 7 8
Then you can use the which function and the - operator in column indexation :
R> df[ , -which(names(df) %in% c("z","u"))]
x ...
How to bind multiple values to a single WPF TextBlock?
...tBlock would then be Foo + 1.
Note: that this is only supported in .NET 3.5 SP1 and 3.0 SP2 or later.
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Adding Permissions in AndroidManifest.xml in Android Studio?
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answered Jun 5 '13 at 19:50
vRallevvRallev
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How to alias a table in Laravel Eloquent queries (or using Query Builder)?
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edited Mar 9 '14 at 4:52
answered Jul 18 '13 at 3:15
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How to add multiple objects to ManyToMany relationship at once in Django ?
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jnns
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answered Feb 10 '11 at 16:10
Yuji 'Tomita' Tomi...
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edited Aug 12 '15 at 22:22
Undo♦
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What is “2's Complement”?
... community wiki
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