Histogram in 3.4.0

Hi, I think there is an issue with FigureWidget in 3.4.0. The behavior I will describe below did not exist in 3.3.0.

I use Jupyter Lab.

import numpy as np

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

# Simulations
n = 100
A = np.arange(1,n+1, dtype=float).reshape(n,1)**(-2)
X = 2*np.random.randint(2, size=(n,1000000))-1

Now, this works: iplot([go.Histogram(x=np.sum(A*X,axis=0))])

This does not work (even though it did before):

# Histogram for S_n
fig = go.FigureWidget()
fig.add_histogram(x=np.sum(A*X,axis=0),
                  opacity=0.75,
                  histnorm='probability density')
fig['layout'].update(title='Distribution of $S_{'+str(n)+'}$', 
                  showlegend=False, height=700)
fig

Also, note that part of the title is not displayed.

[sursu]

@jonmmease Yes. Issue fixed.

Thank you! 👍

[jonmmease]

Hi @sursu, yes the fix will preserve FigureWidget’s efficiency 🙂

As for the situation with your title, at this point LaTeX can’t be mixed with non-latex. So the $signs need to be the first and last characters of your string. In this case you could set your title string to something like '$\\text{Distribution of }S_{10}$' to get what you want. Or, if all you need is italic text and subscripts you could do this in HTML as 'Distribution of <i>S</i><sub>10</sub>'