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How to use R's ellipsis feature when writing your own function?
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115
I read answers and comments and I see that few things weren't mentioned:
data.frame uses lis...
Logical operators for boolean indexing in Pandas
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When you say
(a['x']==1) and (a['y']==10)
You are implicitly asking Python to convert (a['x'...
Installing specific package versions with pip
I'm trying to install version 1.2.2 of the MySQL_python adaptor, using a fresh virtualenv created with the --no-site-packages option. The current version shown in PyPi is 1.2.3 . Is there a way to install the older version? I found an article stating that this should do it:
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Assign multiple columns using := in data.table, by group
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This now works in v1.8.3 on R-Forge. Thanks for highlighting it!
x <- data.table(a = 1:3, ...
What does this square bracket and parenthesis bracket notation mean [first1,last1)?
I have seen number ranges represented as [first1,last1) and [first2,last2) .
4 Answers
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How does !!~ (not not tilde/bang bang tilde) alter the result of a 'contains/included' Array method
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13 Answers
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Regular expression to match any character being repeated more than 10 times
...le regular expression to match the same character being repeated more than 10 or so times. So for example, if I have a document littered with horizontal lines:
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Why does auto a=1; compile in C?
...d d; // actually unsigned int
which is still common in modern code.
C++11 reused the keyword, which few if any C++ programmers were using with the original meaning, for its type inference. This is mostly safe because the "everything is int" rule from C had already been dropped in C++98; the only...
What does “@@ -1 +1 @@” mean in Git's diff output?
...to-file to-file-modification-time
The time stamp looks like 2002-02-21 23:30:39.942229878 -0800 to indicate the date, time with fractional seconds, and time zone. The fractional seconds are omitted on hosts that do not support fractional time stamps.
You can change the header's content wi...
Passing command line arguments to R CMD BATCH
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My impression is that R CMD BATCH is a bit of a relict. In any case, the more recent Rscript e...