About this example
This line graph uses four illustrative ISO dates and measurements from two sites. Site A rises from 4.2 to 5.7, while Site B rises from 3.7 to 4.9. The example does not assign physical units to these values.
Enter dates as YYYY-MM-DD in the first column and one measurement series in each remaining column. Date positions reflect elapsed time: January 1 to February 1 spans 31 days, February 1 to March 1 spans 28, and March 1 to April 1 spans 31.
Rows are sorted chronologically; invalid dates are excluded and reported. Replace the measurements and add units before using the figure in a report. For a numeric X axis, open the annual-publications or treatment-trends example.
The data
| Date | Site A | Site B |
|---|---|---|
| 2026-01-01 | 4.2 | 3.7 |
| 2026-02-01 | 4.8 | 4.1 |
| 2026-03-01 | 5.1 | 4.5 |
| 2026-04-01 | 5.7 | 4.9 |
Rows are sorted by X; missing Y values leave gaps. No statistical test is calculated. Open the example, replace the data with your own, and export the figure as SVG, PDF, PNG or TIFF.