Adding Additional Text To The Hovertext Label

I've searched for some time now and I can't seem to find a related question. There are similar questions, but nothing that gets to the heart of what I am trying to do with the cod

Solution 1:

You want to set the text or hovertext element for each chart/trace. Both text and hovertext will work here. The reason you may need both can be seen here. You may also want to change the hoverinfo element. Your options are 'x', 'y', 'none', 'text', 'all'. Additional resources are: text and annotations, docs, and python example. In addition, to get the count of cases at a time period I took two different groupby operations and then concatenated them together.

Example using your dataframe:

import plotly.graph_objs as go
from plotly.offline import download_plotlyjs, init_notebook_mode, plot, iplot
init_notebook_mode(connected=True)
import pandas as pd

df = pd.DataFrame({
    'subject_number' : [20001, 20001, 20001, 20003, 20003, 20003, 20005, 20005, 
        20005, 20007, 20007, 20007, 20008, 20008, 20008, 20010, 20010, 20010], 

    'visit_label' : ['Day 1', 'Month 6', 'Month 12', 'Day 1', 'Month 6', 
        'Month 12', 'Day 1', 'Month 6', 'Month 12', 'Day 1', 'Month 6',  
        'Month 12', 'Day 1', 'Month 6', 'Month 12', 'Day 1', 'Month 6', 
        'Month 12'],  

    'mjsn':[0, 0.4, 0.2, 0, -0.9, -0.7, 0, 0.1, -0.1, 0, 0, -0.3, 0, -0.3, -0.1,
        0, -0.6, -0.4], 

    'study_arm':['B', 'B', 'B', 'B', 'B', 'B', 'C', 'C', 'C', 'D', 'D', 'D', 
        'C', 'C', 'C', 'A', 'A', 'A']
    })



grouped = df.groupby(['study_arm', 'visit_label'])
tmp1 = grouped.mean()["mjsn"]
tmp2 = grouped.count()["subject_number"]
output_df = pd.concat([tmp1, tmp2], axis = 1)

data = []
for study in output_df.index.get_level_values(0).unique():
    trace = go.Scatter(
        x = output_df.loc[study, :].index,
        y = output_df.loc[study, "mjsn"],
        hovertext= ["msjn:{0}<br>subject:{1}".format(x, int(y)) 
                    for x,y in zip(output_df.loc[study, "mjsn"],
                        output_df.loc[study, "subject_number"])],
        mode = 'lines+markers',
        hoverinfo = 'text'
    )
    data += [trace]
#
iplot(data)

Similar SO questions are here and here