Technical writing, without the clutter
A notebook for technical writing
Latest posts
A note on log-sum-exp
Subtracting the maximum turns an overflow into an exact identity. The same shift makes softmax safe.
Why the sample variance divides by n − 1
A short proof that dividing by n − 1 removes the bias, and a reminder that the unbiased estimator is not the most accurate one.
Two series, one axis each
A chart with two y-axes lets its designer decide where the lines cross. Small multiples and indexed scales leave that decision to the data.