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Alter MySQL table to add comments on columns
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answered Jan 29 '10 at 14:18
RufinusRufinus
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Proper package naming for testing with the Go language
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How to drop columns by name in a data frame
... 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 y
1 1 2
2 2 3
3 3 4...
Difference between MVC 5 Project and Web Api Project
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What is the explanation for these bizarre JavaScript behaviours mentioned in the 'Wat' talk for Code
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Difference between no-cache and must-revalidate
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How to set cookie in node js using express framework?
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Sumit
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answered Apr 25 '13 at 8:09
robertkleprobertkle...
How to hide command output in Bash
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Jeff BowmanJeff Bowman
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R programming: How do I get Euler's number?
...nAdam Mihalcin
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Append text to input field
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edited Oct 11 '18 at 8:04
Dream Hunter - hashADH
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