Vege-Lite encode :point shape and angle

Specific Domains Visualization
1

I want to draw a scatter plot but use different point shape and angles to show different orientations and directions.

the stroke shape and arrow shape seems what I want, but I am have trouble to make it work

function foo(pos;ori=0,dir=90)
    data1 = DataFrame(x=pos[:,1],y=pos[:,2],shape=1,angle=ori)
    data2 = DataFrame(x=pos[:,1],y=pos[:,2],shape=2,angle=dir)
    data = [data1;data2]
    data |> @vlplot(
    mark={:point,filled=true,strokeWidth=4},
    encoding={
    x=:x,y=:y,shape={"shape:n",scale={domain=[1,2],range=[:stroke,:arrow]}},size={"shape:n",scale={domain=[1,2],range=[200,400]}},
    angle="angle:q"
    },
    width=400,height=400 )
end

up = [1:10 3:12]

p=foo(up)

the Vega-Lite says angle is not a valid encoding channel but I saw this.

any suggestions would be appreciated.

2

This is the same question as here, right? No need to post twice :slight_smile:

EDIT: Sorry I originally used the wrong link here. I think this was the same question that was already asked on github?

1 Like
3

Strange, your link to the “other” post points exactly to this post here, and I can’t find the duplicate one.
I hesitate to answer the OP because it may be already answered in the “other” duplicate.

4

“angle” is not supported by VegaLite, see here:
https://github.com/vega/vega-lite/issues/4270

You may try to use Vega syntax (JSON) as in your linked example. On how to use this in Julia can be read here:
https://www.queryverse.org/VegaLite.jl/stable/userguide/vega/

You may also consider to use VegaLite#master where Vega support has been slightly improved:
https://www.queryverse.org/VegaLite.jl/dev/userguide/vega/

1 Like
5

VegaLite.jl now supports the angle encoding channel, see this example.