Data array with null values not aligning with vertical lines


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Posted by Luis on 18th September 2012
Guys,

I am making a graph with the following characteristics:
* It's a Line Graph
* I have one data array with 12 values. Each value corresponds to a month.
* The last 3 values of the array are null since we don't know those values yet. (So my data array looks something like [1,2,3,4,5,6,7,8,9,,,])
* Since I want to show the vertical lines of the grid (vlines) aligned to each month on the X axis, I am using "grid.autofit = true; grid.autofit.numvlines = 11;"

When the array has all 12 values, all the tickmarks are perfectly aligned with each vertical line in the grid. But when I only have the first 9 values (leaving the last three values null in the array), the tickmarks get slightly off to the right for each month and they do not show aligned with the grid.

How do I align the tickmarks with the vertical lines of the grid when I have null values in the data array?

Thanks!
Posted by on 19th September 2012
Hi,

This looks OK:

dev.rgraph.net/demos/line02.html

Keep in mind that if you specify a value for chart.hmargin then that will throw the alignment out of whack.
Posted by on 21st September 2012
Thank you! So it has to say "null" inside the array when there is no value. I was just leaving it blank. I tried it and it displays fine now. Thank you again!
Posted by on 21st September 2012
Hi,

Yes, but ensure that you don't use quotes - otherwise it's a string (that just happens to say null):

[1,9,4,3,1,9,8,4,8,null,null,null, 8, 9, 7]


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