Above All Else, Show the Data.
Every design decision should serve comprehension of the data.
Every editorial and design decision should serve comprehension of the underlying data. Annotations, labels, and context should be placed directly on the graphic. If a reader needs to look at a legend, then cross-reference back to the chart, you've added unnecessary cognitive work.
Edward Tufte, 1983 · Opening principle of VDQI
Charts that apply this principle
Horizontal Bar Chart
Bars drawn horizontally, ideal when category labels are long or numerous.
Marimekko Chart
A mosaic of variable-width columns that encodes two dimensions of part-to-whole.
Box Plot
Shows distribution through quartiles, median, whiskers, and outliers.
ECDF
Empirical cumulative distribution function, a step function showing the proportion of data at or below each value.
Hexagonal Grid Map
Equal-sized hexagons represent regions, eliminating area bias.
Tile Grid Map
Each region is a square tile in a grid with equal visual weight and no geographic distortion.
Connected Scatter Plot
Scatter plot with points connected by lines, showing trajectory through two dimensions.
Heatmap
Color-coded matrix revealing patterns across two categorical dimensions.
Quadrant Chart
2×2 strategic matrix that plots items by two scores and divides the plane into four quadrants — the BCG / Eisenhower / impact-effort visual.
Bullet Sparkline
Compact inline bullet chart for tables and dense dashboards.
Data Table
A structured tabular display with sortable columns, ideal when users need exact values rather than visual patterns.
Heat Table
Data table with cells colored by value - spreadsheet meets heatmap.