Jerry,
Discrete axes disable drawing gridlines at all. But it is possible to get
something that looks like a gridline for specific domain values using
annotations. You should add a column to your datatable after your first
column and give it { role: 'annotation' }, and for each row where you want
a vertical line, add a space for the annotation. Then in your options,
specify the 'domain' annotation style should be 'line', and you'll see a
vertical line for each annotation.
Here is an example that does all that:
http://jsfiddle.net/dlaliberte/Lmvv32nt/
There is a bug in the current release (that will be fixed in the next
release) in which a blank annotation results in 'undefined' being
displayed. I turned off the display of the text by setting is color to
'none'.
On Thu, Jun 18, 2015 at 5:06 PM, <[email protected]>
wrote:
> For a column chart with discrete horizontal values, is is possible to draw
> vertical gridlines on only specific horizontal axis values (not a fixed
> number of evenly spaced gridlines)? The purpose is to differentiate between
> certain values.
>
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