Archived discussions · Captured October 28, 2026

Adding Color to Plots not working with ColumnDataSource

pratikkgandhiJan 08, 2017 #1

Hello,

Can anyone help me out here? Am I doing something wrong? I believe ColumnDataSource behaves differently if plotting multiple plots in one plot, correct?

source = ColumnDataSource(data=dict(Dt=,Census=,CountAtStart=))

plot = figure(plot_width=1100, plot_height=600, x_axis_type = ‘datetime’)

CAHplot.line(x=‘Dt’, y=‘Census’, source=source, line_dash=[4, 4], line_color=‘purple’, alpha = 0.8, line_width=2, legend=‘Predicted’)

CAHplot.line(x=‘Dt’, y=‘CountAtStart’, source=source, line_color=‘blue’, alpha = 0.3, line_width=2, legend=‘Actual’)

Thank you,

Pratik

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BryanJan 08, 2017 #2

I would not say that is correct, at least not any way I can interpret it. ColumnDataSources don't know how many glyphs or plots they are used in, so there is no way for them to behave differently based on that. What is your actual question? You haven't stated what is happening vs what you are expecting to happen, so it's hard to know what you are wanting help with. Offhand, at least in the code you have supplied, your ColumnDataSource is completely empty, so I would not expect anything to be plotted.

Thanks,

Bryan

···

On Jan 7, 2017, at 11:54 PM, pratikkgandhi@gmail.com wrote:

Hello,

Can anyone help me out here? Am I doing something wrong? I believe ColumnDataSource behaves differently if plotting multiple plots in one plot, correct?

source = ColumnDataSource(data=dict(Dt=,Census=,CountAtStart=))

plot = figure(plot_width=1100, plot_height=600, x_axis_type = 'datetime')

CAHplot.line(x='Dt', y='Census', source=source, line_dash=[4, 4], line_color='purple', alpha = 0.8, line_width=2, legend='Predicted')
CAHplot.line(x='Dt', y='CountAtStart', source=source, line_color='blue', alpha = 0.3, line_width=2, legend='Actual')

Thank you,
Pratik

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pratikkgandhiJan 08, 2017 #3

Hi Bryan,

So the ColumnDataSource here is an example just to show that it is ColumnDataSource. It has some values, that are selected based on the Select option. May be the following will be more clear?

source = ColumnDataSource(data=dict(Dt=,Census=,CountAtStart=))

current = df[df['Census'] <= 25].dropna()

**        source.data = {
'Dt' : current['Dt'],
'Census' : current['Census'],
'CountAtStart' : current['CountAtStart'],
}**

CAHplot = figure(plot_width=1100, plot_height=600, x_axis_type = ‘datetime’)

CAHplot.line(x=‘Dt’, y=‘Census’, source=source, line_dash=[4, 4], line_color=‘purple’, alpha = 0.8, line_width=2, legend=‘Predicted’)

CAHplot.line(x=‘Dt’, y=‘CountAtStart’, source=source, line_color=‘blue’, alpha = 0.3, line_width=2, legend=‘Actual’)

And the graph should look like the attachment here.

Let me know if this woulf help or not. Thank you!

···

On Sunday, 8 January 2017 01:20:58 UTC-5, Bryan Van de ven wrote:

I would not say that is correct, at least not any way I can interpret it. ColumnDataSources don’t know how many glyphs or plots they are used in, so there is no way for them to behave differently based on that. What is your actual question? You haven’t stated what is happening vs what you are expecting to happen, so it’s hard to know what you are wanting help with. Offhand, at least in the code you have supplied, your ColumnDataSource is completely empty, so I would not expect anything to be plotted.

Thanks,

Bryan

On Jan 7, 2017, at 11:54 PM, pratik...@gmail.com wrote:

Hello,

Can anyone help me out here? Am I doing something wrong? I believe ColumnDataSource behaves differently if plotting multiple plots in one plot, correct?

source = ColumnDataSource(data=dict(Dt=,Census=,CountAtStart=))

plot = figure(plot_width=1100, plot_height=600, x_axis_type = ‘datetime’)

CAHplot.line(x=‘Dt’, y=‘Census’, source=source, line_dash=[4, 4], line_color=‘purple’, alpha = 0.8, line_width=2, legend=‘Predicted’)

CAHplot.line(x=‘Dt’, y=‘CountAtStart’, source=source, line_color=‘blue’, alpha = 0.3, line_width=2, legend=‘Actual’)

Thank you,

Pratik

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Sebastien_RocheJan 12, 2017 #4

from bokeh.plotting import Figure, output_file

from bokeh.models import ColumnDataSource

from bokeh.resources import CDN

from bokeh.embed import file_html

source = ColumnDataSource(data={‘x’:range(10),‘y’:range(10),‘z’:range(10)[::-1]})

fig = Figure(plot_width=400,plot_height=400)

fig.line(x=‘x’,y=‘y’,line_color=‘purple’,source=source,line_dash=[4,4],alpha=0.8,line_width=2,legend=‘Predicted’)

fig.line(x=‘x’,y=‘z’,source=source,line_color=‘blue’,alpha=0.3,line_width=2,legend=‘Actual’)

outfile=open(‘colotest.html’,‘w’)

outfile.write(file_html(fig,CDN,‘test’))

outfile.close()

This simple example works fine, how does your plot look?

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pratikkgandhiJan 12, 2017 #5

Thank you for your example. It is working now.

···

On Thursday, 12 January 2017 12:17:19 UTC-5, sebastie...@gmail.com wrote:

from bokeh.plotting import Figure, output_file

from bokeh.models import ColumnDataSource

from bokeh.resources import CDN

from bokeh.embed import file_html

source = ColumnDataSource(data={‘x’:range(10),‘y’:range(10),‘z’:range(10)[::-1]})

fig = Figure(plot_width=400,plot_height=400)

fig.line(x=‘x’,y=‘y’,line_color=‘purple’,source=source,line_dash=[4,4],alpha=0.8,line_width=2,legend=‘Predicted’)

fig.line(x=‘x’,y=‘z’,source=source,line_color=‘blue’,alpha=0.3,line_width=2,legend=‘Actual’)

outfile=open(‘colotest.html’,‘w’)

outfile.write(file_html(fig,CDN,‘test’))

outfile.close()

``

This simple example works fine, how does your plot look?

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systemJul 21, 2021 #6

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End of archived discussion · Replies are disabled