Series selection

[westreet]

please see attached file

first. every channel data is realtime data (1000sample/sec ~ 100000sample/sec)
lightning chart can handle that big amount of realtime data?
if it is possible how long data can be store?

all channel data will be stored array or pointlineseries
and if change selection of radio button, selected channel data are displayed lightningchart control (line chart)

please let me know way to solve it
mschart is too slow to does it

sorry for my poor english.

[ArctionPasi]

Hi,

yes, LightningChart can handle it 100 k samples / sec just fine.

See thread-fed multi-channel example, that is pretty close to your goal.

100 k samples/sec realtime, 3 channels

100ksamplesPerSec3channels.jpg (196.8 KiB) Viewed 7269 times

You can feed data to all series to same time, so their data arrays get updated. By setting series.Visible = false, it's hidden, and you can control that with your radio button events.

Set chart.ViewXY.AxisLayout.YAxisLayout = Layered, so they won't be stacked like in this example.

About maximum storage time. By default, SampleDataSeries uses SampleFormat = DoubleFloat, and therefore each data point takes 8 bytes.
By setting it to SampleFormat = SingleFloat, each data point takes only 4 bytes.

Say you have for example 2 GB to use, filling 3 series at same time, using 100 k samples / sec, SampleFormat = SingleFloat:

t = 2*1024*1024*1024 bytes / (3*100000 samples /sec * 4 bytes per sample) = 1789 seconds = ~30 minutes.

LightningChart has automatic destruction of outscrolled data, so it'll free memory. To enable automatic destruction, set ViewXY.DropOldData = true. Then the measurement time is practically unlimited.

[westreet]

thank you for your answer

and i have another question about that.

please see that attached picture.

i that case, how can i feed data to Lightning chart?

it is possible to use one series - multi chart?

[ArctionPasi]

The objects can't be shared between charts. You'll need to create own series for both charts.

SamplesSingle property can share the same array, but that requires setting ViewXY.DropOldSeriesData = false, and assigning the Single[] array for to both chart's series. And you can't use ScrollPosition setting for X axis. So this is pretty much possible only for non-realtime data.

chart1.ViewXY.SampleDataSeries[0].SamplesSingle = yourSharedSamplesArray;
chart2.ViewXY.SampleDataSeries[0].SamplesSingle = yourSharedSamplesArray;

Don't use AddPoints in this approach because it recreates internal arrays for series when it grows large.