2026年6月30日

The four layouts in a network chart that decide what your graph actually shows you

By xiezixing 2026年6月30日

A network chart shows the data after the layout algorithm has decided which features to amplify. Force-directed rewards connectivity. Circular rewards symmetry. Grid rewards order. Pick the layout first, then read the chart.

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The order of three matrix transforms is the only thing your composite image is actually showing you

By xiezixing 2026年6月30日

You load a square photo into an image composite matrix tool, set scaleX to 0.5,…

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The R-squared number your regression tool hands you is not the answer

By xiezixing 2026年6月30日

You ran a regression. The tool handed back a tidy block of numbers: a slope,…

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The two characters in a tracking number that name the carrier

By xiezixing 2026年6月30日

Every tracking number carries its own passport. The first two characters — sometimes three, rarely…

Calendar heatmap poster: 365 squares showing when you actually show up

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A calendar heatmap is the only chart that shows you actually show up

By xiezixing 2026年6月30日

The GitHub contribution graph is not just for code. Used on the right data, a year-of-days heatmap exposes streaks, gaps, and seasonal rhythms that bar charts and line charts actively hide.

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The three characters in a Maidenhead locator that decide your map pin

By xiezixing 2026年6月30日

What a Maidenhead locator really is, and why your coordinates are off by a kilometre…