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Add a vectorized Text Element #1837

jordansamuels opened this Issue Aug 31, 2017 · 1 comment


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jordansamuels commented Aug 31, 2017

The following example works well for n=10, but e.g. n=100 the re-rendering on zoom stops working (on MacBook Pro at least).

%%opts RGB [width=800, height=800]
clusters = np.random.uniform(low=(0,0,0),high=(1,1,.005),size=(n,3))
scatter = hv.Scatter(np.concatenate([scale *  np.random.randn(1000, 2) + (x,y) for x,y,scale in clusters]))
boxes = hv.Path([hv.Box(x,y,scale*6).data[0] for x,y,scale in clusters])
texts = hv.NdOverlay({i: hv.Text(x, y, text=f'{np.round(scale*100, 1)}') for i, (x, y, scale) in enumerate(clusters)}, kdims=['i'])
datashade(scatter) * datashade(boxes) * texts

If we take out the * texts then high e.g. n=1000 zoom works fine.

@philippjfr philippjfr changed the title Performance upgrade for Text Add a vectorized Text Element Sep 15, 2017


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philippjfr commented Sep 15, 2017

We discussed this yesterday and we'd like to either make the Text Element vectorized or add a new vectorized Text Element. I've already written an implementation, which you can view here:

So we only have to decide what to call it or whether to replace the existing Text Element.

@philippjfr philippjfr added the feature label Sep 15, 2017

@philippjfr philippjfr added this to the v1.9 milestone Sep 23, 2017

@philippjfr philippjfr self-assigned this Oct 7, 2017

@philippjfr philippjfr modified the milestones: v1.9, v1.10 Nov 3, 2017

@philippjfr philippjfr referenced this issue Feb 18, 2018


Added Labels element #2352

6 of 6 tasks complete

@philippjfr philippjfr closed this Apr 3, 2018

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