Bokeh server change axis-range

Community Support
1

Hi,

I’m trying to plot live-data coming in from sensors, but I want to make the x-axis move as new data comes in, to only visualise the last 200 (more or less) points.

I found some ways using ‘cursession()’, but that feature seems depreciated in 0.12.1? Is there any way to make the plot auto-pan?

I included my current code.

Thanks!

PlotData.py (842 Bytes)

2

Hi,

A few notes:

The cursession() function as been deprecated since 0.10 IIRC, it was a function of the original Bokeh server, which has been completely removed.

For a current "automatically following" range example, refer to the OHLC app:
  
  https://github.com/bokeh/bokeh/tree/master/examples/app/ohlc

But I must also mention a serious problem with your code: You are trying to update a Bokeh model object (p.x_range) from outside the main thread. This is NEVER a safe operation. If you want to update things from other threads, you must use the technique described in the user's guide:

  http://bokeh.pydata.org/en/latest/docs/user_guide/server.html#updating-from-threads

Thanks,

Bryan

···

On Aug 4, 2016, at 7:56 AM, Wout Van Medegael <[email protected]> wrote:

Hi,

I'm trying to plot live-data coming in from sensors, but I want to make the x-axis move as new data comes in, to only visualise the last 200 (more or less) points.
I found some ways using 'cursession()', but that feature seems depreciated in 0.12.1? Is there any way to make the plot auto-pan?
I included my current code.

Thanks!

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<PlotData.py>

3

OHLC is of great help, thanks!!

···

On 04 Aug 2016, at 15:25, Bryan Van de Ven <[email protected]> wrote:

Hi,

A few notes:

The cursession() function as been deprecated since 0.10 IIRC, it was a function of the original Bokeh server, which has been completely removed.

For a current "automatically following" range example, refer to the OHLC app:
  
  https://github.com/bokeh/bokeh/tree/master/examples/app/ohlc

But I must also mention a serious problem with your code: You are trying to update a Bokeh model object (p.x_range) from outside the main thread. This is NEVER a safe operation. If you want to update things from other threads, you must use the technique described in the user's guide:

  http://bokeh.pydata.org/en/latest/docs/user_guide/server.html#updating-from-threads

Thanks,

Bryan

On Aug 4, 2016, at 7:56 AM, Wout Van Medegael <[email protected]> wrote:

Hi,

I'm trying to plot live-data coming in from sensors, but I want to make the x-axis move as new data comes in, to only visualise the last 200 (more or less) points.
I found some ways using 'cursession()', but that feature seems depreciated in 0.12.1? Is there any way to make the plot auto-pan?
I included my current code.

Thanks!

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<PlotData.py>

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