`LinearBreaksHelper$Companion.computeNiceBreaks` out of memory error

[a-glapinski]

Hi, I've created a plot using following code:

val data = mapOf(
    "Task interval coefficient of variation" to listOf(1.17546, 1.19216, 1.20941, 1.22708, 1.24521, 1.26378, 1.28274, 1.30207, 1.32178, 1.34187, 1.3623, 1.383, 1.40404, 1.42535, 1.44695, 1.46884, 1.49097, 1.51339, 1.53597, 1.55886),
    "Average processing time" to listOf(41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325, 41.1325)
)

val plot = ggplot(data) { x = "Task interval coefficient of variation"; y = "Average processing time" } + geomPoint() + geomSmooth()

Unfortunately, when trying to save it to PNG file using following code:

ggsave(plot, "p1.png")

I've got following error:

Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
    at java.base/java.lang.Double.valueOf(Double.java:537)
    at jetbrains.datalore.plot.base.scale.breaks.LinearBreaksHelper$Companion.computeNiceBreaks(LinearBreaksHelper.kt:82)
    at jetbrains.datalore.plot.base.scale.breaks.LinearBreaksHelper$Companion.access$computeNiceBreaks(LinearBreaksHelper.kt:42)
    at jetbrains.datalore.plot.base.scale.breaks.LinearBreaksHelper.<init>(LinearBreaksHelper.kt:30)
    at jetbrains.datalore.plot.base.scale.breaks.LinearBreaksHelper.<init>(LinearBreaksHelper.kt:10)
    at jetbrains.datalore.plot.base.scale.transform.LinearBreaksGen$Companion.generateBreakValues$plot_base_portable(LinearBreaksGen.kt:37)
    at jetbrains.datalore.plot.base.scale.transform.LinearBreaksGen.generateBreaks(LinearBreaksGen.kt:21)
    at jetbrains.datalore.plot.base.scale.transform.Transforms$BreaksGeneratorForTransformedDomain.generateBreaks(Transforms.kt:70)
    at jetbrains.datalore.plot.builder.layout.axis.AdaptableAxisBreaksProvider.getBreaks(AdaptableAxisBreaksProvider.kt:25)
    at jetbrains.datalore.plot.builder.layout.axis.label.BreakLabelsLayoutUtil.getFlexBreaks(BreakLabelsLayoutUtil.kt:24)
    at jetbrains.datalore.plot.builder.layout.axis.label.VerticalFlexBreaksLabelsLayout.getBreaks(VerticalFlexBreaksLabelsLayout.kt:53)
    at jetbrains.datalore.plot.builder.layout.axis.label.VerticalFlexBreaksLabelsLayout.doLayout(VerticalFlexBreaksLabelsLayout.kt:42)
    at jetbrains.datalore.plot.builder.layout.axis.AxisLayouter.doLayout(AxisLayouter.kt:22)
    at jetbrains.datalore.plot.builder.layout.PlotAxisLayout.doLayout(PlotAxisLayout.kt:42)
    at jetbrains.datalore.plot.builder.layout.XYPlotTileLayout$Companion.computeVAxisInfo(XYPlotTileLayout.kt:203)
    at jetbrains.datalore.plot.builder.layout.XYPlotTileLayout$Companion.computeAxisInfos(XYPlotTileLayout.kt:134)
    at jetbrains.datalore.plot.builder.layout.XYPlotTileLayout$Companion.access$computeAxisInfos(XYPlotTileLayout.kt:103)
    at jetbrains.datalore.plot.builder.layout.XYPlotTileLayout.doLayout(XYPlotTileLayout.kt:27)
    at jetbrains.datalore.plot.builder.layout.SingleTilePlotLayout.doLayout(SingleTilePlotLayout.kt:27)
    at jetbrains.datalore.plot.builder.PlotSvgComponent.buildPlotComponents(PlotSvgComponent.kt:182)
    at jetbrains.datalore.plot.builder.PlotSvgComponent.buildPlot(PlotSvgComponent.kt:111)
    at jetbrains.datalore.plot.builder.PlotSvgComponent.buildComponent(PlotSvgComponent.kt:86)
    at jetbrains.datalore.plot.base.render.svg.SvgComponent.buildComponentIntern(SvgComponent.kt:46)
    at jetbrains.datalore.plot.base.render.svg.SvgComponent.ensureBuilt(SvgComponent.kt:39)
    at jetbrains.datalore.plot.base.render.svg.SvgComponent.getRootGroup(SvgComponent.kt:33)
    at jetbrains.datalore.plot.builder.PlotContainerPortable.buildContent(PlotContainerPortable.kt:87)
    at jetbrains.datalore.plot.builder.PlotContainerPortable.ensureContentBuilt(PlotContainerPortable.kt:44)
    at jetbrains.datalore.plot.MonolithicCommon.buildSvgImagesFromRawSpecs(MonolithicCommon.kt:51)
    at jetbrains.datalore.plot.PlotSvgExportPortable.buildSvgImageFromRawSpecs(PlotSvgExportPortable.kt:42)
    at jetbrains.datalore.plot.PlotSvgExport.buildSvgImageFromRawSpecs(PlotSvgExport.kt:25)
    at jetbrains.datalore.plot.PlotSvgExport.buildSvgImageFromRawSpecs$default(PlotSvgExport.kt:21)
    at jetbrains.datalore.plot.PlotImageExport.buildImageFromRawSpecs(PlotImageExport.kt:90)

Process finished with exit code 1

The direct reason of error is probably the fact that in LinearBreaksHelper$Companion.computeNiceBreaks function step has such a small value that ticks value is never getting higher, so the program never exits the while loop.

[a-glapinski]

I think I posted issue in the wrong repo (it probably should be posted in https://github.com/JetBrains/lets-plot repo) 😅 Please move it if you can.

[alshan]

Yes, we run into limits of double precision here ( Thanks for reporting this. Unfortunately I don't see what else to suggest you now apart from not to use geomSmooth in such marginal cases.

[alshan]

I posted issue in the wrong repo

No, this is fine.

[alshan]

Fixed in v3.2.0