Steema Central

Teechart v2 lists "Reducing number of Points" as a new function. What I am looking for is to decimate the data for large datasets so every point does not actually get rendered to the screen. And to have it done without me doing any coding, of course!

Hi Gp,

DownSampling function reduces the number of points in series by using several different methods:

+ dsAverage : replace group of points with group average values
+ dsMax : replace group of points with group maximum values
+ dsMin : replace group of points with group minimum values
+ dsMinMax : replace group of points with group minimum AND maximum values.

You can see an example of its use at TeeChart features demo. The example is Welcome !\Functions\Extended\Reducing number of points. You'll find features demo included with TeeChart registered or evaluation versions.

You may also be interested in FastLine series DrawAllPoints property. You will find an example at features demo: Welcome !\Chart styles\Standard\Fast Line\Fast Line Speed DrawAll.

Is this new in v2? I thought these functions were in v1 also?

Hi Gp,

Yes, this is function is new in v2 as you can see here. Some functions are already available in v1 but this was implemented in v2.