Applying jitter in scatter diagrams
When there are overlapping data points in a scatter diagram, MedCalc can slightly shift ("jitter") the data points so that the markers do not completely overlap. You then have a visual indication that there are several data points with the same value, or almost the same value.
The following images show scatter diagrams, both for the same data.
The first graph is without jitter:
The following graph is with jitter applied.
The jitter option is available for the following graphs:
- Scatter diagram (correlation menu)
- Scatter diagram & regression line (regression menu)
- Bland & Altman plot
- Deming regression
- Passing & Bablok regression
When one of the axes of the graph does not represent a continuous variable (such as in multiple boxplots) MedCalc always applies jitter automatically.