update data in bar charts

📊 Plotly Python
1

I am wondering whether plotly supports animation for bar charts in Jupyter.

My purpose is to display a bar chart with several sequences of data. The problem is that first I want to display a bar chart with the first sequence of data, then with 1 second delay, update the first plot with the second sequence of data (remove old data and put new data in the same plot) and so on.

Currently in Jupyter notebook, I clear the the cell output to display the next bar chart. Is there a way with plotly that I can just update the data in a single bar chart without changing the frame or clearing the whole output?

Thank you in advance!

2

Hi @tianji,

You can update an existing figure in the Jupyter notebook if you create the figure as a FigureWidget (See https://plot.ly/python/widget-app/) . Here’s an example with a bar chart.

First create the figure with initial data and display it

import plotly.graph_objs as go

data = [go.Bar(
            x=['giraffes', 'orangutans', 'monkeys'],
            y=[20, 14, 23]
    )]
layout = {'yaxis': {'range': [0, 25]}}
fig = go.FigureWidget(data, layout)
fig

newplot-3
newplot-3.png700×450 3.72 KB

Then some time later, update it with new data. This will automatically update the figure displayed above.

bar = fig.data[0]
bar.y = [10, 15, 20]

newplot-4
newplot-4.png700×450 3.61 KB

Hope that helps!
-Jon

1 Like
3

Oh, man! You really saved my day. It works! Thanks a lot.

One more question, do you know whether plotly supports animation for bar charts although it is not about my concern any more?

4

Great! Right now the smooth transition animation is only support in scatter traces.
-Jon

1 Like
5

i was looking similar sort of i posted my code there in community … and saw it later but unfortunatly it it did not solv emy problme and still looking answer

https://community.plotly.com/t/refreshing-the-plotly-with-new-data-python/49300/2