[BUG] Whiskers do not appear in categorical plots?

[lyijin]

Software version info

OS: Linux 5.6.0-2-amd64 #1 SMP Debian 5.6.14-2 (2020-06-09) x86_64 GNU/Linux
Bokeh version: 2.2.2
Python version: 3.8.6

Description of expected behavior and the observed behavior

I used to be able to combine whiskers into categorical plots using Bokeh 1.4.0. When I upgraded to 2.2.2, the whiskers disappeared. The plot I have in mind is a dotplot + whiskers + multi-category plot, with the (single) dot indicating the mean and whiskers as stderr.

Complete, minimal, self-contained example code that reproduces the issue

(this code is lightly edited from https://docs.bokeh.org/en/latest/docs/user_guide/annotations.html?highlight=whisker, and incorporates some categorical code (e.g. x_range=FactorRange(*x)) from https://docs.bokeh.org/en/latest/docs/user_guide/categorical.html.

from bokeh.models import ColumnDataSource, Whisker, FactorRange
from bokeh.plotting import output_file, figure, show, save
from bokeh.sampledata.autompg import autompg as df

output_file('whiskers.html')

colors = ["red", "olive", "darkred", "goldenrod", "skyblue", "orange", "salmon"]

base, lower, upper, mpg = [], [], [], []

for i, year in enumerate(list(df.yr.unique())):
    year_mpgs = df[df['yr'] == year]['mpg']
    mpgs_mean = year_mpgs.mean()
    mpgs_std = year_mpgs.std()
    lower.append(mpgs_mean - mpgs_std)
    upper.append(mpgs_mean + mpgs_std)
    mpg.append(mpgs_mean)
    #base.append(str(year))
    base.append((str(year), 'a'))

#p = figure(plot_width=600, plot_height=300, title="Years vs mpg with Quartile Ranges")
p = figure(x_range=FactorRange(*base), plot_width=600, plot_height=300, title="Years vs mpg with Quartile Ranges")
source_error = ColumnDataSource(data=dict(base=base, lower=lower, upper=upper, mpg=mpg))
p.scatter(x='base', y='mpg', source=source_error)

p.add_layout(
    Whisker(source=source_error, base="base", upper="upper", lower="lower")
)

save(p)

Stack traceback and/or browser JavaScript console output

Screenshots or screencasts of the bug in action

When the code is run as provided above, this is what I got.

When the commented statements are uncommented (i.e. #base.append(str(year)) and #p = figure(plot_width=600, plot_height=300, title="Years vs mpg with Quartile Ranges")), and the line following that is commented out, I get

Not exactly sure what's wrong, but it seems to me that Whisker seem to only appear on numerical-type axis, not a factorial-type one? Thanks for looking into this!

[mattpap]

Currently most annotations are limited to numerical axes, though it should be pretty simple to lift this restriction in Whisker's case.

[alucab]

Hello any workaround to have whiskers on 2.2.3 ?
I would love to use Bokeh in my next application, the code is quite cleaner than Dash and the embedding is waaaay easier.

But i need grouped Bar Charts with error bars :-(

Thanks for any help

[bryevdv]

@alucab the fix for this is merged and will be in the upcoming 2.3.0 release

[alucab]

Hey Brian, thanks for the swift answer ! Have you got an idea of the possible date ? I have thought that i can work around it using vbar segments i overlay but definitely it would be great to have the whiskers

…

On Tue, Jan 5, 2021 at 9:59 PM Bryan Van de Ven ***@***.***> wrote: @alucab <https://github.com/alucab> the fix for this is merged and will be in the upcoming 2.3.0 release — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#10575 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAD6R72OMCGW27JISWRNYVDSYN4UHANCNFSM4SQJKK6Q> .

[ghomem]

Happened to me on the update from 2.0.2 to 2.2.0. Fixed with 2.3.0.

[github-actions]

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