JAVASCRIPT DATA LAB

Data Visualization & Dashboard Studio

Sales increased. Profit fell. Change the JavaScript, inspect the chart, and trace the difference to the records.

Your prediction

Expected result and verification

Transformation editor

Define transform(rows) and return an array of plain records. Apply runs real JavaScript in an isolated worker.

JavaScript source

Dashboard title

Chart Type X field Y field Comparison field Histogram bins Shared group Date field Scatter link field

Grouped charts sum the plotted fields by category. Line and area use input order. Scatter and coordinate charts preserve individual points.

Select a mark or use its data table. This view shows derived values, the scale, SVG position and up to five contributing rows.

Use real transformations, chart encodings, and source data to explain a result.