Kotlin lets-plot: minimal example

Question

I would like to write a completely minimal example of lets-plot, which just saves png and doesn't use any frontend. For this, I created a "helloworld" Kotlin project in IntelliJ IDEA. Then I added Maven dependency org.jetbrains.lets-plot:lets-plot-common:2.1.0. Now if I try to import jetbrains.letsPlot.letsPlot, I get the error "Unresolved reference: letsPlot". Thus, the question is how to write the most minimal lets-plot example, without using any frontend and Gradle.

Answer 1

The right dependencies are org.jetbrains.lets-plot:lets-plot-kotlin-jvm:3.0.2 (for API) and org.jetbrains.lets-plot:lets-plot-image-export:2.1.0 (to be able to export to raster). Now it works, and the resulting image in lets-plot-images directory.

The code:

import jetbrains.letsPlot.export.ggsave
import jetbrains.letsPlot.geom.geomPoint
import jetbrains.letsPlot.letsPlot

fun main() {
    val xs = listOf(0,  0.5, 1, 2)
    val ys = listOf(0, 0.25, 1, 4)
    val data = mapOf<String, Any>("x" to xs, "y" to ys)

    val fig = letsPlot(data) + geomPoint(
        color = "dark-green",
        size = 4.0
    ) { x = "x"; y = "y" }

    ggsave(fig, "plot.png")
}

The resulting image: