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Python Infinity - Any caveats?
...-a-number (NaN) values from simple arithmetic involving inf:
>>> 0 * float("inf")
nan
Note that you will normally not get an inf value through usual arithmetic calculations:
>>> 2.0**2
4.0
>>> _**2
16.0
>>> _**2
256.0
>>> _**2
65536.0
>>> _**...
How to format numbers? [duplicate]
...I first wrote this answer, but the current status looks good.
var n = 100000;
var value = n.toLocaleString(
undefined, // leave undefined to use the browser's locale,
// or use a string like 'en-US' to override it.
{ minimumFractionDigits: 2 }
);
console.log(value);
// In en-US,...
Command-line Unix ASCII-based charting / plotting tool
... + *+ * + * * + sin(x) ****** +
0.8 ++ * * * * * * ++
| * * * * * * |
0.6 ++ * * * * * *...
Extract first item of each sublist
...
201
Using list comprehension:
>>> lst = [['a','b','c'], [1,2,3], ['x','y','z']]
>>&...
How to determine the longest increasing subsequence using dynamic programming?
...
407
OK, I will describe first the simplest solution which is O(N^2), where N is the size of the col...
Why is SSE scalar sqrt(x) slower than rsqrt(x) * x?
...
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edited Oct 7 '09 at 0:02
answered Oct 6 '09 at 23:52
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What is the fastest integer division supporting division by zero no matter what the result is?
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107
Inspired by some of the comments I got rid of the branch on my Pentium and gcc compiler using
...
dropping infinite values from dataframes in pandas?
...nf, -np.inf])
In [12]: df.replace([np.inf, -np.inf], np.nan)
Out[12]:
0
0 1
1 2
2 NaN
3 NaN
The same method would work for a Series.
share
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improve this answer
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...
How does numpy.histogram() work?
...qual width) of each bar.
In this example:
np.histogram([1, 2, 1], bins=[0, 1, 2, 3])
There are 3 bins, for values ranging from 0 to 1 (excl 1.), 1 to 2 (excl. 2) and 2 to 3 (incl. 3), respectively. The way Numpy defines these bins if by giving a list of delimiters ([0, 1, 2, 3]) in this example...
How to round a number to significant figures in Python
...
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