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Your Pivot Table Forgot the Marginal Totals: A Field Guide to the Data Crosstab Generator
Conclusion It was 11:48 PM on a Tuesday when the regional director emailed back: "Your…
Your Spreadsheet Has the Data. The Chart Still Needs a Home.
Embed bar or pie chart images into XLSX workbooks so data and visual reports travel together.
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Stop Copying Chart Colors: Turn One ECharts Theme into 4 Token Formats
What breaks when 4 teams copy the same chart palette into CSS, Tailwind, SCSS, and…
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VP8 Image Analyzer: When a Flat WebP File Becomes a 3D Relief Map
We tend to think of WebP as the format that buys us smaller hero images and faster page loads. But what if every WebP/VP8 file already carries a hidden 3D...
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Basketball Stats Calculator: Three Formulas, One Career, Zero Magic
Box scores lie. eFG%, TS%, and PER redraw the comparison — three formulas, one calculator, and the interpretation work the spreadsheet skips.
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R-Squared Will Lie to You: A Field Guide to Reading Regression Output
Five numbers matter more than R-squared — and in this order. Why held-out validation, residual plots, and prediction intervals beat the headline score every time, and a practical workflow for shipping models that survive production.
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Watch the Bell Curve Emerge from Anything: Inside the Central Limit Theorem Demonstrator
An interactive visual proof that the distribution of sample means converges to a Normal bell curve regardless of source distribution, plus four controls and four source distributions you can dial in.
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Time Series Forecast: The Three Decisions That Decide Whether Browser-Based Forecasting Is Actually Forecasting
Why a forecast line on a chart can be a real projection, a smoothed average, or a forgery — and the model, season-length, and confidence-width levers that tell you which one you are looking at.
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Venn Diagrams That Survive a Three-Meeting Week
A Venn diagram generator that auto-detects parent-child, overlap, and disjoint layouts. Paste JSON or pipe text, get a publishable SVG in 90 seconds.
The four layouts in a network chart that decide what your graph actually shows you
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.