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Home » Developing U++ » UppHub » Scatter. Faster updates for huge datasets
| Scatter. Faster updates for huge datasets [message #26690] |
Wed, 19 May 2010 15:50  |
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koldo
Messages: 3356
Registered: August 2008
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Senior Veteran |
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Hello all
As usually datasets are sequential in X axis, for example, there is a value/second, there are two new functions in Scatter that use this to multiply the update speed:
- SetSequentialX: Indicates that the data has been sequentially inserted following X axis
- SetFastViewX: Indicates that it will be viewed a point per horizontal pixel. This point will be the average of all data that is in that pixel
TestScatter2 includes now a new tab with 200000 points datasets that are easily handled. I have tried it with 2000000 in my two years old computer and it works well in debug mode.
This possibility has been included in .usc file so it can be used at least partially in Layout editor.
Best regards
Iñaki
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| Re: Scatter. Faster updates for huge datasets [message #26701 is a reply to message #26690] |
Wed, 19 May 2010 21:38  |
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| koldo wrote on Wed, 19 May 2010 16:50 |
Hello all
As usually datasets are sequential in X axis, for example, there is a value/second, there are two new functions in Scatter that use this to multiply the update speed:
- SetSequentialX: Indicates that the data has been sequentially inserted following X axis
- SetFastViewX: Indicates that it will be viewed a point per horizontal pixel. This point will be the average of all data that is in that pixel
TestScatter2 includes now a new tab with 200000 points datasets that are easily handled. I have tried it with 2000000 in my two years old computer and it works well in debug mode.
This possibility has been included in .usc file so it can be used at least partially in Layout editor.
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Hello Koldo,
Nice Optimization you did!
But i think that will not works correct for all points data! It works only for x sorted points.
I did not look in detail your changes. But I will do!
Overall, nice realization!
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| Re: Scatter. Faster updates for huge datasets [message #26706 is a reply to message #26702] |
Thu, 20 May 2010 09:10 |
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| koldo wrote on Wed, 19 May 2010 22:55 |
| Quote: |
Hello Koldo,
Nice Optimization you did!
But i think that will not works correct for all points data! It works only for x sorted points.
I did not look in detail your changes. But I will do!
Overall, nice realization!
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Thank Ion 
Yes it is. Both optimizations are centered on X data series. Remember the names. Both ends with "X":
- SetSequentialX: Requires a series of ordered data in X axis
- SetFastViewX: Minimizes pixel drawing considering X axis
Both optimizations could be implemented for vertical series. For real XY plots (like a circle) they are not useful.
However in many cases (from my experience) datasets are sequentially ordered following X axis. And the speed improvement is very high.
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From a few days ago I started to use this control! I will try to come with improvements!
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