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Measuring the distance between two coordinates in PHP
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How to Batch Rename Files in a macOS Terminal?
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234
In your specific case you can use the following bash command (bash is the default shell on mac...
Cluster analysis in R: determine the optimal number of clusters
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1024
If your question is how can I determine how many clusters are appropriate for a kmeans analysis...
How does python numpy.where() work?
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answered Apr 12 '11 at 22:48
Joe KingtonJoe Kington
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Omit rows containing specific column of NA
... function and put it into a function thusly:
DF <- data.frame(x = c(1, 2, 3), y = c(0, 10, NA), z=c(NA, 33, 22))
completeFun <- function(data, desiredCols) {
completeVec <- complete.cases(data[, desiredCols])
return(data[completeVec, ])
}
completeFun(DF, "y")
# x y z
# 1 1 0 NA
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How to convert a string or integer to binary in Ruby?
... number to a string representing the number in the base specified:
9.to_s(2) #=> "1001"
while the reverse is obtained with String#to_i(base):
"1001".to_i(2) #=> 9
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What are bitwise shift (bit-shift) operators and how do they work?
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1728
The bit shifting operators do exactly what their name implies. They shift bits. Here's a brie...
LINQ to SQL Left Outer Join
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logical8
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answered Mar 31 '09 at 8:33
Marc Gravell♦Marc Gravell
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How to delete a module in Android Studio
...Excluded" option isn't there anymore.
The current (Android Studio 0.8.x - 2.2.x) way to do this is via the Project Structure dialog. It can be accessed via "File -> Project Structure" or by right-clicking on a Module and selecting "Module Settings".
Then select the module, and click the "minu...
Add column with constant value to pandas dataframe [duplicate]
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The reason this puts NaN into a column is because df.index and the Index of your right-hand-sid...