Update axis with streaming data

Community Support
1

When streaming data to a plot being displayed via bokeh serve, how does one go about updating the y axis? The x axis updates as new data comes in, but the y axis in my graphs end up fixed.

I found this thread from 4 years ago Redirecting to Google Groups but it doesn’t seem to fit the current methodology. (Is cursession still accessible in the library?)

Thanks,

Jordan

2

Hi,

cursession related to the long-gone first version of the Bokeh server, it no longer exists and is no longer relevant for anything. As long as you have a default DataRange on the y-axis, then it should update automatically just like the x-axis. You can see the y-axis update automatically in this streaming app example:

  https://github.com/bokeh/bokeh/tree/master/examples/app/ohlc

Without seeing any code it's hard to speculate, except to suggest that you are probably setting a fixed range for the y-axis somehow.

Thanks,

Bryan

···

On Jun 1, 2018, at 09:04, [email protected] wrote:

When streaming data to a plot being displayed via bokeh serve, how does one go about updating the y axis? The x axis updates as new data comes in, but the y axis in my graphs end up fixed.

I found this thread from 4 years ago Redirecting to Google Groups but it doesn't seem to fit the current methodology. (Is cursession still accessible in the library?)

Thanks,
Jordan

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3

Hey Bryan,

I am going to try to write a test case for this so I can open a bug report, but I found that the same code running on 0.12.15 the y axis would update with streaming data, but would not on 0.12.16.

Thanks,

Jordan

···

On Friday, June 1, 2018 at 11:10:34 AM UTC-5, Bryan Van de ven wrote:

Hi,

cursession related to the long-gone first version of the Bokeh server, it no longer exists and is no longer relevant for anything. As long as you have a default DataRange on the y-axis, then it should update automatically just like the x-axis. You can see the y-axis update automatically in this streaming app example:

    [https://github.com/bokeh/bokeh/tree/master/examples/app/ohlc](https://github.com/bokeh/bokeh/tree/master/examples/app/ohlc)

Without seeing any code it’s hard to speculate, except to suggest that you are probably setting a fixed range for the y-axis somehow.

Thanks,

Bryan

On Jun 1, 2018, at 09:04, [email protected] wrote:

When streaming data to a plot being displayed via bokeh serve, how does one go about updating the y axis? The x axis updates as new data comes in, but the y axis in my graphs end up fixed.

I found this thread from 4 years ago https://groups.google.com/a/continuum.io/forum/#!topic/bokeh/j_xKiwth5Xw but it doesn’t seem to fit the current methodology. (Is cursession still accessible in the library?)

Thanks,

Jordan

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