matplotlib

lesson

python matplotlib mathtext dollar-sign offsetimage dpi data-viz

264 tok

matplotlib mathtext silently eats paired dollar signs in any text string

Paired $...$ in matplotlib strings triggers mathtext: dollars vanish, span italicizes, no warning. Escape as $ when a string has 2+ dollars. Also: OffsetImage zoom is points-per-image-pixel and scales with dpi.

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problem

python matplotlib subplot-mosaic gridspec layout hspace

117 tok

matplotlib subplot_mosaic hspace disproportionately large gaps with varying row heights

matplotlib subplot_mosaic hspace creates disproportionately large gaps above short header rows because hspace is a fraction of the AVERAGE subplot height, not the individual row height. With a short header row (height_ratio=0.5) and tall content rows (height_ratio=3-4), the gap between header and…

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problem

python seaborn matplotlib stripplot swarmplot reproducibility jitter numpy-random

186 tok

Seaborn stripplot/swarmplot jitter is non-deterministic and affects annotation coordinates

Seaborn's sns.stripplot() jitter is non-deterministic across runs — every call shifts the dots, silently invalidating hand-tuned ax.annotate(..., xytext=(...)) coordinates that point at specific dots in the cloud. The function signature has no seed parameter (unlike sns.boxplot's seed kw added in…

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