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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...
Return two and more values from a method
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4 Answers
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Can I keep Nuget on the jQuery 1.9.x/1.x path (instead of upgrading to 2.x)?
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Getting and removing the first character of a string
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answered Mar 14 '14 at 9:41
bartektartanusbartektartanus
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Create a variable name with “paste” in R?
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Append column to pandas dataframe
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45
Or pd.concat([dat1, dat2], axis=1) in this case.
– DSM
Dec 16 '13 at 3:35
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mongodb group values by multiple fields
... {
"book" : "book4",
"count" : 1
},
{
"book" : "book5",
"count" : 1
...
std::next_permutation Implementation Explanation
...td:next_permutation was implemented so I extracted the the gnu libstdc++ 4.7 version and sanitized the identifiers and formatting to produce the following demo...
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Is there a JavaScript strcmp()?
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leaf
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answered Jul 24 '09 at 18:38
newacctnewacct
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How can I remove a flag in C?
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342
Short Answer
You want to do an Bitwise AND operation on the current value with a Bitwise NOT o...