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Apply a function to every row of a matrix or a data frame
...:6, nrow=3, byrow=TRUE)
R> M
[,1] [,2]
[1,] 1 2
[2,] 3 4
[3,] 5 6
R> apply(M, 1, function(x) 2*x[1]+x[2])
[1] 4 10 16
R>
This takes a matrix and applies a (silly) function to each row. You pass extra arguments to the function as fourth, fifth, ... arguments to app...
How to get the last N rows of a pandas DataFrame?
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408
Don't forget DataFrame.tail! e.g. df1.tail(10)
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Cast Object to Generic Type for returning
... SpaceTruckerSpaceTrucker
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How do I get the name of captured groups in a C# Regex?
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edited Sep 4 '09 at 19:45
answered Sep 4 '09 at 19:37
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Boolean literals in PowerShell
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174
$true and $false.
Those are constants, though. There are no language-level literals for boolean...
Difference between `mod` and `rem` in Haskell
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432
The integer passed to the constructor represents its initial capacity, i.e., the number of ele...
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147
You need to indicate the groupId, the artifactId and the version for your artifact:
mvn instal...
Google Map API V3: How to add Custom data to markers
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As a Google Marker is a JavaScript object, you may add custom information in the form key: value...