Scientific Python

Tweets about SciPy (Scientific Python) and related topics from @JohnDCook.

[Scientific Python @SciPyTip]

How trig functions differ between base Python, NumPy, and other languages https://t.co/TQqrf8qkIl

[Scientific Python @SciPyTip]

sys.float_info.min is the smallest positive floating point value.

[Scientific Python @SciPyTip]

Matplotlib accepts TeX input everywhere it accepts text (labels, annotations, etc.)

[Scientific Python @SciPyTip]

FFT: prefer scipy.fft.fft / rfft over older scipy.fftpack.* for a cleaner API.

[Scientific Python @SciPyTip]

You can create histograms with matplotlib.pyplot.hist.

[Scientific Python @SciPyTip]

scipy.integrate.dblquad is a general purpose routine for double integrals. Inner limits of integration can be functions.

[Scientific Python @SciPyTip]

Generate random samples from a tetrahedron https://t.co/nQOfEqmYHg

[Scientific Python @SciPyTip]

If you need to compute a binomial coefficient with integer arguments exactly, use scipy.special.comb with exact=True.

[Scientific Python @SciPyTip]

Exact binomial coefficients: scipy.special.comb(n, k, exact=True) returns Python ints (can be huge).

[Scientific Python @SciPyTip]

QR decomposition with NumPy https://t.co/zYxtnRizf0

[Scientific Python @SciPyTip]

With Python code

https://t.co/ZHDSYXsySK

[Probability Fact @ProbFact]

Turning K-L divergence into a metric

https://t.co/e3u9eNgdy5

[Scientific Python @SciPyTip]

Check for NaNs quickly: np.isnan(x).any() beats Python loops.

[Scientific Python @SciPyTip]

Searching Greek and Hebrew with regular expressions in Python https://t.co/OXfFPwYfyp

[Scientific Python @SciPyTip]

Can compute arbitrary analytic functions of a matrix with scipy.linalg.funm().

[Scientific Python @SciPyTip]

scipy.integrate.romb requires 2**k + 1 evenly-spaced samples.

[Scientific Python @SciPyTip]

The routines trapz and simps in scipy.integrate can take unevenly spaced function samples as input.

[Scientific Python @SciPyTip]

Kolmogorov-Smirnov test for goodness of fit: scipy.stats.kstest()

[Scientific Python @SciPyTip]

When you look into the details, the fact that calculations like sin(1e12) are fully accurate is very impressive.

https://t.co/bkdFbLkdBR

[Scientific Python @SciPyTip]

Minimizing Boolean expressions in Python using the Quine-McCluskey algorithm https://t.co/kS5bPJEtV3

[Scientific Python @SciPyTip]

Peter Norvig’s Python etudes https://t.co/Faq9VwCp7C