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locking/setting valueRange programmatically?
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drose  
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 More options Jul 17 2012, 8:51 am
From: drose <tommy...@gmail.com>
Date: Tue, 17 Jul 2012 05:51:27 -0700 (PDT)
Local: Tues, Jul 17 2012 8:51 am
Subject: locking/setting valueRange programmatically?
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Hi:

 Am I correct in thinking that valueRange can only be set at the time of
graph instantiation?  I would like to be able to change it dynamically
based on user input (beyond the capability provided by y-axis zooming
which, for example, does not allow zooming out beyond the initial state).
 I tried this using valueRange on an existing graph, and it didn't appear
to have any effect.

 I also wondered whether there is a way of suppressing the automatic
rescaling that occurs during panning. It is a nice feature for many
applications but in others I would like to be able to keep the scaling
constant.

thanks,
Dave.


 
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Dan Vanderkam  
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 More options Jul 18 2012, 10:00 am
From: Dan Vanderkam <dan...@gmail.com>
Date: Wed, 18 Jul 2012 09:00:06 -0500
Local: Wed, Jul 18 2012 10:00 am
Subject: Re: locking/setting valueRange programmatically?
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On Tue, Jul 17, 2012 at 7:51 AM, drose <tommy...@gmail.com> wrote:
> Hi:

>  Am I correct in thinking that valueRange can only be set at the time of
> graph instantiation?  I would like to be able to change it dynamically
> based on user input (beyond the capability provided by y-axis zooming
> which, for example, does not allow zooming out beyond the initial state).
>  I tried this using valueRange on an existing graph, and it didn't appear
> to have any effect.

Calling updateOptions with valueRange should work. See
http://dygraphs.com/tests/zoom.html

>  I also wondered whether there is a way of suppressing the automatic
> rescaling that occurs during panning. It is a nice feature for many
> applications but in others I would like to be able to keep the scaling
> constant.

Setting a valueRange (either in the constructor or later) will disable the
automatic rescaling.

  - dan


 
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