Error Bars

The Error Bars chart is a visualization designed to simultaneously display a measured value and its associated uncertainty. Each bar represents an aggregated measure, while the error segments illustrate the possible range around that value. The extension allows you to configure different calculation modes (percentage, fixed value, min/max, symmetric interval) to respect the statistical logic of each use case.

Bars can be grouped by dimension, then subdivided by details to highlight the internal structure of each category. Integrated sorting and color management facilitate comparison between groups, while maintaining clear readability even when multiple segments are displayed. Formatting options (axes, grid, background, labels) allow you to adapt the rendering to your graphic charter or desired level of detail.

Labels and error bars are optimized to remain legible without overloading the chart, while Tableau tooltips continue to provide precise access to underlying values. The extension has been designed to remain effective with a moderate number of bars, and to guide the user in configuring parameters adapted to their analytical context.

Analytical Purpose

The analytical objective of Error Bars is to make explicit the uncertainty in your indicators, by showing not only a central value but also the range within which that value can reasonably vary. This representation helps distinguish truly significant differences from those that may be due to noise or data variability. It allows analysts and decision-makers to judge the robustness of conclusions, compare groups while taking into account their error intervals, and avoid over-interpreting visual differences that would not be statistically reliable.

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