Interpolation

Interpolation = "linear" | "step" | "step-before" | "step-after" | "monotone" | "natural" | "basis" | "cardinal"

Defined in: spec/plot.ts:16

The path drawn between consecutive points of a line or area.

linear joins them directly and claims nothing the data does not say. The curved options assert that something continuous happened between the samples; the step options assert that nothing did until the next one.