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How to count certain elements in array?
... just to compare it to a value is not elegant.
– Felix Kling
May 25 '11 at 8:33
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Combine two columns of text in pandas dataframe
I have a 20 x 4000 dataframe in Python using pandas. Two of these columns are named Year and quarter . I'd like to create a variable called period that makes Year = 2000 and quarter= q2 into 2000q2 .
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How can I get the source code of a Python function?
...ting the lines of source code, and tuple[1] is the line number in the context of execution where it was run. In IPython; this is the line number within the cell not the overall notebook
– The Red Pea
Sep 23 '14 at 5:32
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How to remove outliers from a dataset
...d of data, they are given an age and a beauty rating from 1-5. When I do boxplots of this data (ages across the X-axis, beauty ratings across the Y-axis), there are some outliers plotted outside the whiskers of each box.
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How to make rpm auto install dependencies
...cal repository, e.g. /home/user/repo.
Move the RPMs into that directory.
Fix some ownership and filesystem permissions:
# chown -R root.root /home/user/repo
Install the createrepo package if not installed yet, and run
# createrepo /home/user/repo
# chmod -R o-w+r /home/user/repo
Create a reposit...
“Cloning” row or column vectors
Sometimes it is useful to "clone" a row or column vector to a matrix. By cloning I mean converting a row vector such as
9 A...
T-SQL split string
...s in R2. I have made sure I have select permissions on any split function examples. Any help greatly appreciated.
26 Answer...
How to check if one of the following items is in a list?
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>>> a = [1,2,3,4]
>>> b = [2,7]
>>> print(any(x in a for x in b))
True
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Bash set +x without it being printed
Does anyone know if we can say set +x in bash without it being printed:
5 Answers
5
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Pointers in C: when to use the ampersand and the asterisk?
...hem as pointers, you'll be using * to get at the values inside of them as explained above, but there is also another, more common way using the [] operator:
int a[2]; // array of integers
int i = *a; // the value of the first element of a
int i2 = a[0]; // another way to get the first element
To...