pcolor

Hi all
I have a numpy array of size [Number_of_time_steps,N1,N2]. I want to have a pcolor map in which I can enter the time-step number and it will update the N1xN2 pcolor map automatically. I left a question about this in Stackoverflow and somebody recommended that I use Bokeh, but I cannot see the equivalent of pcolor in Bokeh documentation. So, I was wondering if this feature is added to Bokeh, and if so, be grateful if somebody let me know about it, preferably with a simple example.
Thanks.

If you just want to colormap a scalar 2d array as an image, you can use Figure.image:

  http://bokeh.pydata.org/en/latest/docs/gallery/image.html

If you specifically want individual quads for some reason, instead of an image, there is nothing in Bokeh that will do that automatically (it would make a nice addition to bokeh.charts, perhaps)

Bryan

···

On Jun 16, 2015, at 3:49 AM, Vahid S. B. <[email protected]> wrote:

Hi all
I have a numpy array of size [Number_of_time_steps,N1,N2]. I want to have a pcolor map in which I can enter the time-step number and it will update the N1xN2 pcolor map automatically. I left a question about this in Stackoverflow and somebody recommended that I use Bokeh, but I cannot see the equivalent of pcolor in Bokeh documentation. So, I was wondering if this feature is added to Bokeh, and if so, be grateful if somebody let me know about it, preferably with a simple example.
Thanks.

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Thanks! I tried figure.image. The output seems very primitive compared to pyplot.pcolor, but given the interactive options, seems to be the best that I can find. And although this is not part of the original question, but if you could guide me towards the method or class I should use to add an Edit Box to the figure.image to update its contents, I’d be much grateful.
Vahid

···

On Tuesday, 16 June 2015 12:19:47 UTC+2, Bryan Van de ven wrote:

If you just want to colormap a scalar 2d array as an image, you can use Figure.image:

    [http://bokeh.pydata.org/en/latest/docs/gallery/image.html](http://bokeh.pydata.org/en/latest/docs/gallery/image.html)

If you specifically want individual quads for some reason, instead of an image, there is nothing in Bokeh that will do that automatically (it would make a nice addition to bokeh.charts, perhaps)

Bryan

On Jun 16, 2015, at 3:49 AM, Vahid S. B. [email protected] wrote:

Hi all

I have a numpy array of size [Number_of_time_steps,N1,N2]. I want to have a pcolor map in which I can enter the time-step number and it will update the N1xN2 pcolor map automatically. I left a question about this in Stackoverflow and somebody recommended that I use Bokeh, but I cannot see the equivalent of pcolor in Bokeh documentation. So, I was wondering if this feature is added to Bokeh, and if so, be grateful if somebody let me know about it, preferably with a simple example.

Thanks.


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In MPL, pcolor is little more than a collection/grid of polygons which share the same* edges. You can achieve a similar effect with Bokeh’s patches, see for an example:
https://groups.google.com/a/continuum.io/d/msg/bokeh/ef27EtmqaMs/kBaE6hc6hFkJ

Regards,
Rutger

*its not exactly the same, its a different edge at the same location, overplotting each other. Both in MPL and Bokeh. You would need topography support to prevent overplotting.

···

On Wednesday, June 17, 2015 at 11:39:38 AM UTC+2, Vahid S. B. wrote:

Thanks! I tried figure.image. The output seems very primitive compared to pyplot.pcolor, but given the interactive options, seems to be the best that I can find. And although this is not part of the original question, but if you could guide me towards the method or class I should use to add an Edit Box to the figure.image to update its contents, I’d be much grateful.
Vahid

On Tuesday, 16 June 2015 12:19:47 UTC+2, Bryan Van de ven wrote:

If you just want to colormap a scalar 2d array as an image, you can use Figure.image:

    [http://bokeh.pydata.org/en/latest/docs/gallery/image.html](http://bokeh.pydata.org/en/latest/docs/gallery/image.html)

If you specifically want individual quads for some reason, instead of an image, there is nothing in Bokeh that will do that automatically (it would make a nice addition to bokeh.charts, perhaps)

Bryan

On Jun 16, 2015, at 3:49 AM, Vahid S. B. [email protected] wrote:

Hi all

I have a numpy array of size [Number_of_time_steps,N1,N2]. I want to have a pcolor map in which I can enter the time-step number and it will update the N1xN2 pcolor map automatically. I left a question about this in Stackoverflow and somebody recommended that I use Bokeh, but I cannot see the equivalent of pcolor in Bokeh documentation. So, I was wondering if this feature is added to Bokeh, and if so, be grateful if somebody let me know about it, preferably with a simple example.

Thanks.


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