Re: [Semediawiki-user] SRF jqplotbar options

[Yaron K. <ya...@gm...>]

Hi Simon,

Thanks for putting that demo together - I was planning to put together
something similar, but it might have taken a while. Anyway, thanks to
that demo I was able to diagnose the problem - it's actually a bug in
jqPlot. The SRF code uses a jqPlot bar graph option called
'autoscale', that automatically calculates the "tick" values, but it
fails for small values, or negative numbers:

http://groups.google.com/group/jqplot-users/browse_thread/thread/6abbd6ac50572dcc?pli=1

Before I discovered 'autoscale', Sanyam and I actually had some code
to calculate the tick values manually, so I stuck that back in and
made some improvements to it. I just checked the code in to SVN, so if
you update the SRF code now it should look better. Please let me know
if you find any problems with it, though.

-Yaron


On Fri, Sep 24, 2010 at 5:45 AM, Simon Denham
<sim...@po...> wrote:
> Further to the previous message I thought I'd check on
> http://scratchpad.referata.com/ to see if I could see the same behaviour and
> it works exactly the same (though I changed the big numbers to smaller big
> numbers so it was less different). See:
>
> http://scratchpad.referata.com/wiki/JQuery
>
> -----Original Message-----
> From: Simon Denham [mailto:sim...@po...]
> Sent: 23 September 2010 17:31
> To: 'Yaron Koren'
> Cc: sem...@li...
> Subject: Re: [Semediawiki-user] SRF jqplotbar options
>
> Hey Yaron,
>
> Thanks for your reply! I disabled the three extensions you mentioned, and
> checked others for javascript, and it didn't make any difference. Lightbox
> is a rather hacky extension to use lightbox within mediawiki [1], It
> conflicts with imagemagick though which I'd been using to present Tiffs so I
> might drop it anyway.
>
> I experimented further and think the problem is caused by small numbers. The
> Artefact measurements have Type:Measurement whose default unit is cm, I
> wondered if this was the issue and converted ArtefactLength to type:Number
> which appeared to solve the issue [2] but the default unit the data was
> entered in was mm and so it reverted to that making the numbers much larger
> so I created a series of some very small numbers (from 0.1 to 0.9) [3]
> wherein the scale jumped to 1000 and the units are all but invisible.
>
> I re-enabled the javascript altering extensions too and they appear to cause
> no change, so I'm relatively sure it isn't them. It could be a problem with
> the custom units, but that doesn't explain why [3] didn't work either! When
> I included some large numbers in the query [4] it appears to work again,
> although unsurprisingly the smallest numbers are invisible. I do hope this
> is useful!
>
> Thanks again for your time,
>
> Simon
>
> P.S. Just converted Type:Measurement to mm instead of cm and the graphs for
> the other measurements now work [5] so it does appear to be something to do
> with very small numbers.
>
> [1] http://www.mediawiki.org/wiki/Extension:LightboxThumbs
>
> [2] http://shdenham.co.uk/wiki/Practice#Artefact_Length
>
> [3] http://shdenham.co.uk/wiki/Practice#TestNumber_Small_No
>
> [4] http://shdenham.co.uk/wiki/Practice#TestNumber_All
>
> [5] http://www.shdenham.co.uk/wiki/Measurements_of_Artefacts_from_Arpachiyah
>
>
> -----Original Message-----
> From: Yaron Koren [mailto:ya...@gm...]
> Sent: 21 September 2010 18:11
> To: Simon Denham
> Cc: sem...@li...
> Subject: Re: [Semediawiki-user] SRF jqplotbar options
>
> Hi Simon,
>
> Sorry for the very long delay. I finally got the chance to look into this
> now, and I have to say it's extremely odd - I haven't seen behavior like
> that (the bars taking up only a small percentage of the
> graph) on any other wiki. My guess is that this might be based on some other
> Javascript library conflicting with jqPlot. I see from the page source that
> there are at least three other extensions that are adding their own
> Javascript to the page, that might be causing the issue - CategoryTree,
> SQFT, and an extension called "Lightbox", which I've never heard of (I've
> heard of the JS library, but not of the MW extension). Could you try
> unincluding all three extensions in LocalSettings.php and see if that fixes
> the issue, and if so, could you narrow down which extension is doing it?
>
> -Yaron
>
>
> On Fri, Sep 3, 2010 at 10:36 AM, Simon Denham
> <Sim...@po...> wrote:
>> Dear all,
>>
>> I was wondering if there were other ways to customise the appearance
>> of the bar graphs.
>>
>> Specifically a way to change the axes numbering, at the minute it
>> seems (at least partially) related to the height (or width depending
>> on alignment) of the graph and changing the columns so each alternate
>> column has a different colour. To illustrate the first issue:
>>
>> http://www.shdenham.co.uk/wiki/Measurements_of_Artefacts_from_Arpachiy
>> ah
>>
>> as can be seen there under Length the graph is large but this results
>> in the y axis going to 100 while the largest seal length is only 3.5.
>> The Width graph was the best compromise I could find that let you see
>> height (and this is where the alternate colour would be useful) but is
>> rather too small. Height, for some reason its scale goes to 20 despite
>> the largest height being only 1.76.
>>
>> Thanks again for Sanyam Goyal and Yaron Koren for the JQuery library work!
>>
>> Simon
>>
>>
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