scalanlp/breeze-viz

*breeze-viz has moved back to the main breeze repo*

breeze-viz's Issues

Cut a 0.5.2 release?

Hey Martin,

I cut a new minor release of Breeze. Any objections to cutting a new release of Breeze Viz that just updates the Breeze dependency?

-- David

Switch backend to GNUplot

GNUplot is a really mature and maintained graphing solution.

It supports as many output formats as you'd imagine, ranging from SVG, PNG, interactive, PDF, Latex (EPS + .tex file with textual data).

The generation of such graph is really simple, since it's just text (which we could dynamically generate), no code or libraries to be called.

It also supports 3D surface graphing.

Release for Breeze 0.10

Breeze 0.10 has been released and many other libraries are using it. If you depend on some of these libraries as well as breeze-viz you will end up with two different versions of brezze.

For example: Users should be able to use this in their build.sbt:

libraryDependencies ++= Seq(
    "org.scalanlp" %% "breeze" % "0.10",
    "org.scalanlp" %% "breeze-viz" % "0.10"
)

Currently that will print this error

[info] Resolving org.scalanlp#breeze-viz_2.10;0.10 ...
[warn]  module not found: org.scalanlp#breeze-viz_2.10;0.10
[warn] ==== local: tried
[warn]   /Users/tobber/.ivy2/local/org.scalanlp/breeze-viz_2.10/0.10/ivys/ivy.xml
[warn] ==== public: tried
[warn]   https://repo1.maven.org/maven2/org/scalanlp/breeze-viz_2.10/0.10/breeze-viz_2.10-0.10.pom
[warn] ==== Sonatype Snapshots: tried
[warn]   https://oss.sonatype.org/content/repositories/snapshots/org/scalanlp/breeze-viz_2.10/0.10/breeze-viz_2.10-0.10.pom
[warn] ==== Sonatype Releases: tried
[warn]   https://oss.sonatype.org/content/repositories/releases/org/scalanlp/breeze-viz_2.10/0.10/breeze-viz_2.10-0.10.pom
[info] Resolving org.fusesource.jansi#jansi;1.4 ...
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  ::          UNRESOLVED DEPENDENCIES         ::
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::
[warn]  :: org.scalanlp#breeze-viz_2.10;0.10: not found
[warn]  ::::::::::::::::::::::::::::::::::::::::::::::

breeze-viz gives HeadlessException under Databricks

I tried importing breeze-viz-2.10-0.11.2 into a Databricks environment. Here is a code snippet I used to test basic operations.

import breeze.linalg._
import breeze.plot._

val f = Figure()
val p = f.subplot(0)
val x = linspace(0.0,1.0)
p += plot(x, x :^ 2.0)
p += plot(x, x :^ 3.0, '.')
p.xlabel = "x axis"
p.ylabel = "y axis"
f.saveas("lines.png")

It gives me the following exception:

java.awt.HeadlessException: 
No X11 DISPLAY variable was set, but this program performed an operation which requires it.
    at java.awt.GraphicsEnvironment.checkHeadless(GraphicsEnvironment.java:207)
    at java.awt.Window.<init>(Window.java:535)
    at java.awt.Frame.<init>(Frame.java:420)
    at javax.swing.JFrame.<init>(JFrame.java:218)
    at breeze.plot.Figure.breeze$plot$Figure$$frame$lzycompute(Figure.scala:88)
    at breeze.plot.Figure.breeze$plot$Figure$$frame(Figure.scala:87)
    at breeze.plot.Figure.refresh(Figure.scala:132)
    at breeze.plot.Figure$$anon$1.refresh(Figure.scala:181)
    at breeze.plot.Plot$$anonfun$refresh$3.apply(Plot.scala:51)
    at breeze.plot.Plot$$anonfun$refresh$3.apply(Plot.scala:51)
    at scala.collection.Iterator$class.foreach(Iterator.scala:727)
    at scala.collection.AbstractIterator.foreach(Iterator.scala:1157)
    at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
    at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
    at breeze.plot.Plot.refresh(Plot.scala:51)
    at breeze.plot.Plot.$plus$eq(Plot.scala:33)

I read some Stack Overflow posts advising to explicitly set java.awt.headless to true, but it doesn't seem to have any effect. Also java.awt.GraphicsEnvironment.isHeadless() returns true.

My environment is Databricks version 2.0.1 running Scala 2.10.4 and Oracle Java 1.7.0_65.

Is breeze-viz suitable for use in a notebook environment such as Databricks? It would be nice to use with Scala notebooks (similar to matplotlib with Python notebooks).

Own SVG OpenGL Charting / Visualisation Library

Is it possible to more charting to SVG and OpenGL than depend on JFreeChart.

Taking over ....

Hi David,

I'm very much willing in taking over and continuing the visualisation as I can provide experience with JFreeChart and have done scientific visualisation.
Apart from that I have done rendering of LaTex labels / figure descriptions, etc. in order to enrich figures by proper math typed text and lables. Technically, LaTex was rendered to a Java Graphics2D with JLaTexMath.
Furthermore, rendering to a specialized PdfGraphics2D gave the possibility to easily export to pdf. (which is very handy for publishing figures in publications etc.)

Let me know your comments.

Cheers,

Martin