Draw Fixed Straight Horizontal Line on a Chart in Scattered Chart

[RAO]

In visualization chart I need to draw a fixed horizontal line in chart
that should represent a threshold for satisfactory score. This needs
to be done in both Scattered and Line chart. Is it possible and would
someone please help me in this regard.

Thanks.
Rao

[Erez Bixon]

Hi Rao,

There's no standard support for such lines. 

However, you can create an additional series and force it into looking like a fixed horizontal line.

It will work both in Scattered and Line charts.

See example in http://savedbythegoog.appspot.com/?id=148771db63111715b13fd49ba2732f8bfd4201a4 - take a look at the source code.

Hope this helps,

EZChart

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[Karl Guillotte]

Hi, 

How it make it happens when the line chart is controlled by a control (ChartRangeFilter) ? I am computing 'x' values at regular interval, but not ideal... 

Thanks for your help

Karl

On Tuesday, September 6, 2011 2:34:19 AM UTC-7, EZChart wrote:

Hi Rao,

There's no standard support for such lines. 

However, you can create an additional series and force it into looking like a fixed horizontal line.

It will work both in Scattered and Line charts.

See example in http://savedbythegoog.appspot.com/?id=148771db63111715b13fd49ba2732f8bfd4201a4 - take a look at the source code.

Hope this helps,

EZChart

On Mon, Sep 5, 2011 at 6:50 PM, RAO <victorio...@gmail.com> wrote:

In visualization chart I need to draw a fixed horizontal line in chart
that should represent a threshold for satisfactory score. This needs
to be done in both Scattered and Line chart. Is it possible and would
someone please help me in this regard.

Thanks.
Rao

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To post to this group, send email to google-visualization-api@googlegroups.com.
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[asgallant]

Unfortunately, that it the only way to make it work.  The charts do not take data points outside the range of the chart into account when drawing the chart, so you need to add the values in with the same granularity as your data (generally 1 per row in your DataTable).