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Datashader alpha not in Holoviews #3611

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zertrin opened this issue Apr 9, 2019 · 2 comments · Fixed by #3664
Closed

Datashader alpha not in Holoviews #3611

zertrin opened this issue Apr 9, 2019 · 2 comments · Fixed by #3664
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type: enhancement Minor feature or improvement to an existing feature
Milestone
v1.12.2

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@zertrin
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zertrin commented Apr 9, 2019

Similar to issue #2108, min_alpha is exposed, but not alpha for datashade()

WARNING:root:datashade: 'alpha' will be ignored (not a Parameter).
@jbednar
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jbednar commented Apr 9, 2019 •
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What were you hoping alpha would do, as an argument to datashade()? Datashader already uses the alpha channel in its own computations, returning RGBA images. ETA: Never mind; it only uses alpha internally when doing count_cat; otherwise alpha is available. In that case, this should be done, just as for min_alpha.

@philippjfr philippjfr added the type: enhancement Minor feature or improvement to an existing feature label Apr 9, 2019
@philippjfr philippjfr added this to the v1.12.1 milestone Apr 9, 2019
@philippjfr philippjfr modified the milestones: v1.12.1, v1.12.2 Apr 22, 2019
@philippjfr philippjfr mentioned this issue Apr 29, 2019
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type: enhancement Minor feature or improvement to an existing feature
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Expose (data)shade alpha option holoviz/holoviews
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@zertrin @philippjfr @jbednar