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pandas DataFrame: replace nan values with average of columns
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10 Answers
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Are list-comprehensions and functional functions faster than “for loops”?
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The following are rough guidelines and educated guesses based on experience. You should timeit...
User recognition without cookies or local storage
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How to convert floats to human-readable fractions?
Let's say we have 0.33 , we need to output 1/3 .
If we have 0.4 , we need to output 2/5 .
26 Answers
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how does multiplication differ for NumPy Matrix vs Array classes?
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The main reason to avoid using the matrix class is that a) it's inherently 2-dimensional, and ...
Adding a column to a data.frame
... below. I want to add a column that classifies my data according to column 1 ( h_no ) in that way that the first series of h_no 1,2,3,4 is class 1, the second series of h_no (1 to 7) is class 2 etc. such as indicated in the last column.
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How to use a decimal range() step value?
Is there a way to step between 0 and 1 by 0.1?
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Why does changing 0.1f to 0 slow down performance by 10x?
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Welcome to the world of denormalized floating-point! They can wreak havoc on performance!!!
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What is a regular expression which will match a valid domain name without a subdomain?
...ee comments), given your specific requirements:
/^[a-zA-Z0-9][a-zA-Z0-9-]{1,61}[a-zA-Z0-9]\.[a-zA-Z]{2,}$/
But note this will reject a lot of valid domains.
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