String category names with Wisp scala plotting library

Question

I am trying to plot bars for String categories with Wisp. In other words, I have a string (key) and a count (value) in my repl and I want to have a bar chart of the count versus the key.

I don't know if something easy exists. I went as far as the following hack:

val plot = bar(topWords.map(_._2).toList)
val axisType: com.quantifind.charts.highcharts.AxisType.Type = "category"
val newPlot = plot.copy(xAxis = plot.xAxis.map {
  axisArray => axisArray.map { _.copy(axisType = Option(axisType),
                                      categories = Option(topWords.map(_._1))) }
})

but I don't know if it works because I don't find a way to visualize newPlot. Or maybe adding a method to the Wisp source implementing the above is the way to go?

Thanks for any help.

PS : I don't have the reputation to create the wisp tag, but I would have...

Austin · Accepted Answer · 2015-03-26 00:30:49Z

3

Update: in wisp 0.0.5 or later this will be supported directly:

column(List(("alpha", 1), ("omega", 5), ("zeta", 8)))

enter image description here

====

Thanks for trying out wisp (I am the author). I think a problem that you may have encountered is by naming your variable plot, you overrode access to the plot method defined by Highcharts, which allows you to plot any Highchart object. (now that I see it, naming your plot "plot" is an unfortunately natural thing to do!)

I'm filing this as a github issue, as category names are very common.

This works for me. I used column for vertical bars:

import com.quantifind.charts.Highcharts._
val topWords = Array(("alpha", 14), ("beta", 23), ("omega", 18))
val numberedColumns = column(topWords.map(_._2).toList)
val axisType: com.quantifind.charts.highcharts.AxisType.Type = "category"
val namedColumns = numberedColumns.copy(xAxis = numberedColumns.xAxis.map {
  axisArray => axisArray.map { _.copy(axisType = Option(axisType),
                                       categories = Option(topWords.map(_._1))) }
})
plot(namedColumns)

producing this visualization: enter image description here

(You could also consider creating one bar at a time, and use the legend to name them)

edited Mar 26, 2015 at 0:30

answered Mar 23, 2015 at 0:13

Austin

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6 Comments

Wilmerton Over a year ago

Hi, thanks for your answer! Problem is that I don't have this behaviour. numberedColumns generate the first plot, but executing the namedColumns doesn't produce anything. Then again, I tried in the spark-shell (where I ultimately wants to use wisp). For the record, namedColumns returns

com.quantifind.charts.highcharts.Highchart = Highchart(List(Series(Vector(Data(0,14,None,None), Data(1,23,None,None), Data(2,18,None,None)),None,None,None,Some(column),None,None,None,None,series)),

... which looks wrong. I will test in a scala repl to see if your solution works there.

Wilmerton Over a year ago

no luck with the sbt console, same behavior. PS I: tried on mac and linux for spark-shell, only on linux for sbt console. PS II: I pulled wisp and built a fat jar just now to do the test, but using scala 2.10.4, don't know if it matters.

Austin Over a year ago

Ah - I left it out of the response. You have to call plot(namedColumns). I tested this in the spark shell and it worked for me. Do you see two plots or only one?

Wilmerton Over a year ago

ouch. Sorry for the blind copy paste... thanks a lot! it works.

Austin Over a year ago

Hey, I've modified wisp to more directly support named axis categories. Checkout the PR: github.com/quantifind/wisp/pull/31 Should go out with wisp 0.0.5

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