What is a Line Chart?
A line chart is a type of chart which displays information as a series of data points connected by straight line segments. It is the most fundamental and commonly used chart type across business intelligence and data analytics, serving as the default choice for mapping continuous variables.
When should you use a Line Chart?
Line charts are highly effective for showing changes over time (time-series analysis). You should choose a line chart when:
- You want to display trends, growth patterns, or cycles over minutes, days, months, or years.
- Your data contains ordered intervals (chronological order is the most common).
- You are comparing multiple categories or series to see if their trajectories correlate.
Best Practices for Designing Line Charts
- Keep the X-Axis chronological: Place time units on the X-axis, progressing from left to right.
- Limit the number of series: Avoid plotting more than 4 or 5 lines on a single chart to prevent a "spaghetti chart" effect that makes it unreadable.
- Use appropriate scales: While bar charts must start at zero, line charts can start at a non-zero minimum value to highlight subtle fluctuations, provided it is clearly labeled.
Step-by-Step Guide to Generate Line Charts on plotox
Creating a chart is simple and doesn't require registration:
- 1. Drag and drop your CSV or TSV data file into the plotox Dashboard.
- 2. Under Select Chart Type, click on the **Line Chart** icon.
- 3. Pick your timeline column for the X-Axis, and check the box next to your numeric fields for the Y-Axis.
- 4. Customize your titles and download your chart as a vector SVG or web-ready PNG.