How do I render gaps or nulls or breaks in the data

[jyasuna]

I am starting with this data (just as an example)

Double[] x = new Double[]{1d,2d,3d,4d,5d};
Double[] y = new Double[]{1d,2d,null,4d,5d};

When converting the data to primitives for the DataSet the "null" becomes "Double.NaN" (I do the conversion)

I had hoped I would then see a simple line plot with a break in it, meaning a line for 1->2 and then a line from 4->5

But instead I see a "sawtooth" where line is drown from 2 down to the x-axis and back up again to 3

So, how do I handle "breaks" in my data? I just want that {2,null} to be considered in x-axis ranging but not drawn

[jyasuna]

So, I tried something that almost worked

I set ErrorDataSetRenderer.setAllowNaNs(true)

Then I sent in the following data (converting nulls to Double.NaN of course)

new Integer[]{1,2,3,4,5,6,7,8,9,10},
new Double[]{1d,2d,3d,4d,null,6d,7d,8d,9d,10d},

neither 4->5 nor 5->6 segments were drawn (that's good),
however 3->4 segment also was not drawn (that's bad)

any ideas ?

I am trying to move all of the development away from JFreechart and instead using chart-fax ...

[wirew0rm]

Hey, glad to see that you already found setAllowNaNs(). The reason this is not enabled by default is that before javafx11, NaNs were not handled propertly. Could you try to disable data reduction on the renderer? This is not the expected behavior, but if the error is there this would be a viable workaround for your current number of points and would narrow down the problem.

Hope this helps, Alex.

[jyasuna]

I tried ErrorDataSetRenderer with "setPointReduction(false) & setAllowNaNs(true)" and indeed this did work

I also tried using ReducingLineRenderer and that worked as well

[wirew0rm]

Ok ,thanks for confirming. I'll have to add some testcases to the point reduction algorithm which include NaNs.

[wirew0rm]

I did a fix for this in #414, thanks for reporting will probably be fixed in the next release.

[jyasuna]

Hello, Do you have an example where the data along one of the axes are Integers only? I am trying to do this, and if I zoom in too tightly the grid lines are not placed properly? I am sure the issue is on my end, which is why I am asking to see if you have an example like this? Thx … jules From: Alexander Krimm ***@***.***> Sent: Thursday, May 6, 2021 11:21 AM To: GSI-CS-CO/chart-fx ***@***.***> Cc: Jules Yasuna ***@***.***>; Author ***@***.***> Subject: Re: [GSI-CS-CO/chart-fx] How do I render gaps or nulls or breaks in the data (#413) I did a fix for this in #414 <#414> , thanks for reporting will probably be fixed in the next release. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#413 (reply in thread)> , or unsubscribe <https://github.com/notifications/unsubscribe-auth/AA6OD2ETA4YHV3AYVPSVS2DTMKXUZANCNFSM44C5JZMQ> . <https://github.com/notifications/beacon/AA6OD2B5ZEN44Y6362AH243TMKXUZA5CNFSM44C5JZM2YY3PNVWWK3TUL52HS4DFWFCGS43DOVZXG2LPNZBW63LNMVXHJKTDN5WW2ZLOORPWSZGOAAFMBZQ.gif>

[RalphSteinhagen]

Hi, this shouldn't be an issue ... there are quite many examples in samples where the x-values are integers.

You may check out the different samples also as shown here.