matplotlib-users

[Matplotlib-users] zoom a plot

[Xiaobo Y. <xia...@gm...>]

Hi, I use matplotlib to create a png file, then display it in a web
browser. All works fine. Now I want to zoom the plot. What I can think of
is:

1) Get coordinates (x1, y1), (x2, y2) of the image when user makes an area
selection on the image;

2) Convert (x1, y1), (x2, y2) to the real values matplotlib was plotting;

3) Request matplotlib to create a new png file using the updated area
values.

Could anybody please let me know how to accomplish step 2?

Many thanks,
Tom

Re: [Matplotlib-users] zoom a plot

[Paul H. <pmh...@gm...>]

I don't think you'll get acceptable performance out of that workflow.

I recommend looking into the webagg backend:
http://matplotlib.org/users/whats_new.html#webagg-backend

On Mon, Sep 15, 2014 at 8:38 AM, Xiaobo Yang <xia...@gm...> wrote:

> Hi, I use matplotlib to create a png file, then display it in a web
> browser. All works fine. Now I want to zoom the plot. What I can think of
> is:
>
> 1) Get coordinates (x1, y1), (x2, y2) of the image when user makes an area
> selection on the image;
>
> 2) Convert (x1, y1), (x2, y2) to the real values matplotlib was plotting;
>
> 3) Request matplotlib to create a new png file using the updated area
> values.
>
> Could anybody please let me know how to accomplish step 2?
>
> Many thanks,
> Tom
>
>
> ------------------------------------------------------------------------------
> Want excitement?
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Re: [Matplotlib-users] zoom a plot

[Tom Y. <xia...@gm...>]

Thank you for your quick answer. I understand the performance issue you
mentioned. For now it is only a proof of concept.

I just figured out how to do it in theory by using
figure.subplot.left|right|bottom|top plus a few other settings.

I'll certainly look at the webagg backend. Are there any examples available?



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Re: [Matplotlib-users] zoom a plot

[Paul H. <pmh...@gm...>]

Yes. They are on the same webpage to which I linked earlier.

http://matplotlib.org/search.html?q=codex+webagg&check_keywords=yes&area=default

On Mon, Sep 15, 2014 at 9:28 AM, Tom Young <xia...@gm...> wrote:

> Thank you for your quick answer. I understand the performance issue you
> mentioned. For now it is only a proof of concept.
>
> I just figured out how to do it in theory by using
> figure.subplot.left|right|bottom|top plus a few other settings.
>
> I'll certainly look at the webagg backend. Are there any examples
> available?
>
>
>
> --
> View this message in context:
> http://matplotlib.1069221.n5.nabble.com/zoom-a-plot-tp43952p43954.html
> Sent from the matplotlib - users mailing list archive at Nabble.com.
>
>
> ------------------------------------------------------------------------------
> Want excitement?
> Manually upgrade your production database.
> When you want reliability, choose Perforce
> Perforce version control. Predictably reliable.
>
> http://pubads.g.doubleclick.net/gampad/clk?id=157508191&iu=/4140/ostg.clktrk
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>