Rounding in Python

In school we round numbers like 0.5, 1123.5 towards the bigger number. It’s a “round half up” method. That introduces an undesired bias some cases. For example if we have a large data set, and we aggregate some column containing a lot of .5 fractions. In order to adjust for it in many cases a rounding of 0.5 towards nearest even number is applied. It’s “Rounding half to even” or “banker’s rounding”....

January 10, 2021 · SergeM

Symbolic math and python

With the help of python and SymPy module one can do pretty neat computations. For example when I took a course about Robotic Preception on Coursera I had to find a cross product of two vectors v1 x v2 represented in a generic form: v1 = (a, b, c) v2 = (d, e, 0) Normally I would write it down on a piece of paper and do the computations myself....

December 31, 2020 · SergeM

Math explained and visualized

Here I will collect links to well-written articles about math and algorithms. Visual Information Theory. Nice post about probabilities, entropy. The whole blog has awesome visualizations. Highly recommended. MNIST For ML Beginners - Nice introduction into machine learning with TensorFlow Brilliantly wrong - blog by Alex Rogozhnikov, with fantastic visualizations of many algorithms and concepts Collection of data science notebooks. Deconvolution and Checkerboard Artifacts by Odena, et al., 2016 - explanation of deconvolution operation in neural networks with awesome interactive visualizations...

May 20, 2017 · SergeM