How do you add labels to a plotly boxplot in python?

Question

I have the following code;

y = errnums
err_box = Box(
    y=y,
    name='Error Percent',
    boxmean='sd',
    marker=Marker(color='red'),
    boxpoints='all',
    jitter=0.5,
    pointpos=-2.0
)
layout = Layout(
    title='Error BoxPlot',
    height=500,
    width=500
)
fig = Figure(data=Data([err_box]), layout=layout)
plotly.image.save_as(fig, os.path.join(output_images, 'err_box.png'))

Which generates the following image;

What I would like to do is the following two things;

1) Add % next to the y-axis numbers. (Instead of having a traditional y-axis label saying "Error (%)")

2) Label all the vital points: mean, first quartile, third quartile, and stdev. Ideally the label would be a 4 sig-fig ('.2f') number next to the line.

Also, the stdev is the dotted line, and the diamond represents 1 sigma? 2 sigma?

Answer 1

For labels, try annotations. You'll have to compute the quartiles and mean yourself to position the labels.

Simple example:

import plotly.plotly as py
from plotly.graph_objs import *

data = Data([
    Box(
        y=[0, 1, 1, 2, 3, 5, 8, 13, 21],
        boxpoints='all',
        jitter=0.3,
        pointpos=-1.8
    )
])
layout = Layout(
    annotations=Annotations([
        Annotation(
            x=0.3,
            y=8.822,
            text='3rd Quartile',
            showarrow=False,
            font=Font(
                size=16
            )
        )
    ])
)
fig = Figure(data=data, layout=layout)
plot_url = py.plot(fig)

Simple Python boxplot

I recommend adding and positioning the annotations in the Plotly workspace, and then viewing the generated code:

The diamond shows the mean, and +- 1 standard deviation away from it.

It's not currently possible to add a % to the y-axis labels.