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Add new row to dataframe, at specific row-index, not appended?
...ds the (often slow) rbind call:
existingDF <- as.data.frame(matrix(seq(20),nrow=5,ncol=4))
r <- 3
newrow <- seq(4)
insertRow <- function(existingDF, newrow, r) {
existingDF[seq(r+1,nrow(existingDF)+1),] <- existingDF[seq(r,nrow(existingDF)),]
existingDF[r,] <- newrow
existin...
git: Show index diff in commit message as comment
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answered Jan 20 '11 at 17:09
Alan Haggai AlaviAlan Haggai Alavi
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What is the behavior of integer division?
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edited Jun 30 '18 at 17:32
cmaher
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answered Aug 3...
Passing parameters in rails redirect_to
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edited Oct 21 '15 at 14:19
bmalets
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How to delete an element from an array in C#
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342
If you want to remove all instances of 4 without needing to know the index:
LINQ: (.NET Framewo...
Checking if a string can be converted to float in Python
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edited Nov 11 '19 at 12:29
Richard Simões
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a...
PostgreSQL - max number of parameters in “IN” clause?
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Jordan S. JonesJordan S. Jones
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add a ...
How to insert a character in a string at a certain position?
...igit value. I want to display it as a String with a decimal point (.) at 2 digits from the end of int . I wanted to use a float but was suggested to use String for a better display output (instead of 1234.5 will be 1234.50 ). Therefore, I need a function that will take an int as paramete...
How to calculate “time ago” in Java?
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edited Nov 28 '16 at 8:15
jdersen
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answered Oct 4 '10...