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Changing column names of a data frame
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600
Use the colnames() function:
R> X <- data.frame(bad=1:3, worse=rnorm(3))
R> X
bad ...
Chrome DevTools Devices does not detect device when plugged in
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30 Answers
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Why are we not to throw these exceptions?
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answered Mar 17 '14 at 12:05
pokepoke
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Can't stop rails server
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305
You can use other ports like the following:
rails server -p 3001
Normally in your terminal y...
How to Add a Dotted Underline Beneath HTML Text
...>
<style type="text/css">
u {
border-bottom: 1px dotted #000;
text-decoration: none;
}
</style>
</head>
<!-- Body, content here -->
</html>
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Insert space before capital letters
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170
You can just add a space before every uppercase character and trim off the leading and trailing ...
CreateElement with id?
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edited May 16 '18 at 22:03
Ivan
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answered Feb 2...
Java SE 6 vs. JRE 1.6 vs. JDK 1.6 - What do these mean?
... However, when I install Java SE 6, I get a JVM that reports as version 11.0! Who can solve the madness?
6 Answers
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String concatenation: concat() vs “+” operator
...ing:
java.lang.String cat(java.lang.String, java.lang.String);
Code:
0: new #2; //class java/lang/StringBuilder
3: dup
4: invokespecial #3; //Method java/lang/StringBuilder."<init>":()V
7: aload_1
8: invokevirtual #4; //Method java/lang/StringBuilder.append:...
Create a matrix of scatterplots (pairs() equivalent) in ggplot2
...been replaced by the ggpairs() function from the GGally package as @naught101 suggests in another response below to this question.
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