| Re: Slow object graphics when plotting multiple lines [message #92972 is a reply to message #92971] |
Mon, 04 April 2016 08:27   |
steven.abel
Messages: 13
Registered: April 2016
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Junior Member |
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On Monday, 4 April 2016 16:09:36 UTC+1, Paul van Delst wrote:
> Hello,
>
> On 04/04/16 10:48, Yngvar Larsen wrote:
>> Another trick, using a single array with lines separated by NaN.
>> Thisworks both in direct and function graphics. With these two added, plus
>> the new CONNECTIVITY trick, your TEST routine prints this on my machine
>> (2012 iMac)
>
> I'm amazed at everyone's ability to discover these things! Wow.
>
> But, I think this need for various "tricks" to speed up basic plotting
> functionality is something that the IDL/Harris folks need to fix by
> making PLOT(/OVERPLOT) - with additional keywords if necessary - work
> similarly, i.e. fast.
>
> Similarly when plotting gobs of satellite data on maps, surfaces,
> contours, etc.
>
> The slowness of function graphics when plotting lots and lots of data
> makes it unusable for looking at large datasets.
>
> Other, similar, tools don't have these issues. (Yes, I mean matlab).
>
> cheers,
>
> paulv
Thank you alx and Yngvar - your suggestions have helped enormously. It is fair to say that without this newsgroup I would have given up and gone back to Direct graphics for this task. Completely agree with Paul as well - it shouldn't be this complicated to do a simple plot.
Cheers
Steve
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