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Results tagged with python
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user 35351
Python is an interpreted, general-purpose high-level programming language whose design philosophy emphasizes code readability. Use the python tag for all Python related questions. If you believe your question may be even more specific, you can include a version specific tag such as python-3.x.
3
votes
1
answer
1k
views
Workaround for the precision limitation for Python's round() function
I'm trying to come up with a general way to correctly round floats with Python, given the known limitation of round():
Note: The behavior of round() for floats can be surprising: for example, round …
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4
votes
Workaround for the precision limitation for Python's round() function
Following ferada's advice I looked up the decimal module and it simplifies things quite a bit.
This is a function that does what format_5() does but much succinctly:
def format_5_dec(f):
new_flo …
- 597
1
vote
1
answer
2k
views
Mean of combined sublists with different lengths
I have a seemingly simple issue. Consider this list:
a = [[12.0, 5.0, 63.0], [0.1, 2.0, 7.1, 3.0, 2.3, 5.0, 8.4]]
I want to find the mean (using numpy) of all the elements in its sublists combined. …
- 597
2
votes
1
answer
2k
views
5
votes
1
answer
94
views
Increase performance of Bayesian likelihood equation
I need to calculate a Bayesian likelihood in its negative logarithmic form:
$$-\ln L = N\ln M -\sum\limits_{i=1}^{N} \ln\left\{P_i \sum\limits_{j=1}^M \frac{\exp\left[ -\frac{1}{2}\left(\sum_{k=1}^D …
- 597
7
votes
1
answer
7k
views
Obtaining prediction bands for regression model
I'm trying to generate prediction bands for an exponential fit to some 2-dimensional data (available here).
The data (blue points), best fit found by scipy.optimize.curve_fit (red curve), and lower & …
- 597
3
votes
1
answer
3k
views
Coordinates of 2D points zoomed in/out
This might be a simple issue that I am overcomplicating, but I've spent quite some time reading about polygon scaling and I've come to the conclusion that it is not precisely what I need.
Given a set …
- 597
2
votes
1
answer
193
views
Neural network text classifier
I wrote a simple NN text classifier to help me quickly sort through the new daily submissions to the arXiv. It
downloads the new submissions, processings their titles and abstracts,
trains a NN on so …
- 597
10
votes
2
answers
209
views
Improve performance of math function applied to arrays
This block of code is already somewhat optimized thanks to some answers given over at Stack Overflow. In the last question I made (Improve performance of function without parallelization) the code was …
- 597
4
votes
0
answers
97
views
Estimate area of cropped circle with Monte Carlo
I looking around and not finding anything, I developed a simple function for estimating the area of a possibly cropped circle inside a frame. It uses a very basic MC implementation.
It is pretty fast …
- 597
6
votes
1
answer
3k
views
Improve performance of Gaussian kernel function evaluation
I need to improve the performance of a function that calculates the integral of a two-dimensional kernel density estimate (obtained using the function stats.gaussian_kde) where the domain of integrati …
- 597
0
votes
2
answers
171
views
Faster generation of list with multiple sublists [closed]
I'm trying to improve the performance of some rather large code. One of the bottlenecks is the line below. It doesn't look like much but it is processed millions of times.
Is there any way to improve …
- 597