TLineSeries and decimation

[Totte Karlsson]

Hi,
I have some data that are becoming very large. Each series > millions.

To show such a dataset I will need to decimate, I guess, the data, otherwise the plotting becomes really slow.

Question is, do I have to decimate before adding to TLineSeries or is there any inbuilt decimation available?

Would be great if one could specify how many points to show (plot) for a Serie, regardless how many points are available within the series itself.

Totte

[Narcís]

Hi Totte,

To show such a dataset I will need to decimate, I guess, the data, otherwise the plotting becomes really slow.

In that case I recommend you to follow the approach explained at the Real-time Charting article at http://www.teechart.net/reference/articles/index.php.

Question is, do I have to decimate before adding to TLineSeries or is there any inbuilt decimation available?

There's a built-in mechanism. This is DownSampling function and I explained how it works here.

Would be great if one could specify how many points to show (plot) for a Serie, regardless how many points are available within the series itself.

There's not a fixed number of points you can display in a series/chart. The only limitation here is the memory of the machine where the application runs.