2d Plotting Library for Scala and Scala.js

Creates scatter, line, contour, raster, barplots and boxplots, histograms, density plots. Composite figure of multiple plots.

Renders to

java Graphics2D
PDF/SVG/EPS (via VectorGraphics2D)
SVG (via ScalaTags, both in browser or on jvm)
Html5 Canvas (scala-js)

Usage

See the documentation website at https://pityka.github.io/nspl/ .

This library is built for Scala 2.13 and Scala 3.2.

Maven coordinates:

For jvm: libraryDependencies += "io.github.pityka" %% "nspl-awt" % "0.0.???"
For canvas (Scala.js): libraryDependencies += "io.github.pityka" %% "nspl-canvas-js" % "0.0.???"

Version policy

nspl uses the recommended versioning scheme enforced with https://github.com/scalacenter/sbt-version-policy.

How to build the website

The website is built with hugo and the hugo-book theme.

The theme is a git submodule. It must be initialized.

git submodule update --init

Create and serve the site with:

sbt docs/mdoc docs/unidoc && cd website && hugo

How to render plot o file?

I have looked at the examples in the file:

https://github.com/pityka/nspl/blob/master/saddle/src/test/scala/plots/plots.test.scala

But cannot get rendering to a file to work. I have the following code:

    import org.nspl.xyplot
    import org.nspl.scalatagrenderer
    import org.nspl.ColumnLayout

    import org.nspl.awtrenderer._
    import org.nspl.group


    val x : Seq[Double] = Seq(1d,2d,3d)
    val y : Seq[Double] = Seq(6d,7d,10d)
    val plot = xyplot(x -> y)(
      ylab = "y",
      xlab = "x",
      main = "main"
    )
    show(plot)

    val gallery: Build[_root_.org.nspl.Elems1[_root_.org.nspl.Elems2[_root_.org.nspl.XYPlotArea, _root_.org.nspl.Legend]]] = group(
      plot,
      ColumnLayout(3)
    )
    show(gallery)

    import org.nspl.awtrenderer.renderToFile

    renderToFile(gallery, 1000, "image/svg")

    renderToFile(plot, 1000, "image/svg")

The show call. The last two calls fail with:

[error] UFSpec.scala:1893: inferred type arguments [org.nspl.Build[org.nspl.Elems1[org.nspl.Elems2[org.nspl.XYPlotArea,org.nspl.Legend]]]] do not conform to method renderToFile's type parameter bounds [K <: org.nspl.Renderable[K]]
[error]     renderToFile(gallery, 1000, "image/svg")
[error]     ^
[error] UFSpec.scala:1893: type mismatch;
[error]  found   : org.nspl.Build[org.nspl.Elems1[org.nspl.Elems2[org.nspl.XYPlotArea,org.nspl.Legend]]]
[error]     (which expands to)  ((Option[org.nspl.Elems1[org.nspl.Elems2[org.nspl.XYPlotArea,org.nspl.ElemList[org.nspl.Elems2[org.nspl.ShapeElem,org.nspl.TextBox]]]]], org.nspl.Event)) => org.nspl.Elems1[org.nspl.Elems2[org.nspl.XYPlotArea,org.nspl.ElemList[org.nspl.Elems2[org.nspl.ShapeElem,org.nspl.TextBox]]]]
[error]  required: K
[error]     renderToFile(gallery, 1000, "image/svg")
[error]                  ^
[error] UFSpec.scala:1896: inferred type arguments [org.nspl.Build[org.nspl.Elems1[org.nspl.Elems2[org.nspl.XYPlotArea,org.nspl.Legend]]]] do not conform to method pngToFile's type parameter bounds [K <: org.nspl.Renderable[K]]
[error]     pngToFile(gallery)
[error]     ^

Here is my SBT build file

lazy val root = (project in file(".")).
  settings(
    inThisBuild(List(
      organization := "com.example",
      scalaVersion := "2.12.4",
      version      := "0.1.0-SNAPSHOT"
    )),
    name := "UFD",
    libraryDependencies ++= Seq(
      "com.github.pathikrit" %% "better-files" % "3.2.0",
      "io.github.pityka" %% "nspl-awt" % "0.0.19",
      "io.github.pityka" %% "nspl-scalatags-jvm" % "0.0.19",
      "org.scalatest" %% "scalatest" % "3.0.4" % "test")
)

Can anyone tell me what I am doing wrong?
BTW, is their a support forum or mailing list for nspl?

TIA

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2d Plotting Library for Scala and Scala.js

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