scaling chart

[ChrisRose]

I'm running data acqusition vi in RT. Vi should run long periods, like months or even years. In this time becomes numerous measuring points. I save the data to FP memory, but I also want to show the data in a chart. Controlling vi I use web browser. What would be the easiest way of scaling chart so that it shows curve of measured data in a hole period? FP has only 32 MB memory, so increasing history length is not a good idea? 

[Vesa_K]

Hi,

You can use Waveform Graph instead of Chart to show all data points at the same time. However, showing a large graph or large set of datapoints in the web browser user interface is not recommended because it takes lot of resources. It also steals limited memory of RT. If you have to show all data points at the same time I recomend you to create a host application for that: RT takes care of data acquisition, and host application saves the data and provides reasonable user interface.

Vesa K / NI Finland

[ChrisRose]

Is there easy way to calculate example 1000 points which represents curve for hole period and display those?

[Vesa_K]

Hi,

One of the easiest way to do that is Sample Compression Express VI. You just specify the reduction factor to calculate the mean value. For instance: You have 100k points of raw data as an input, reduction factor is 100 -> You will get 1000 points of averaged data.

Thanks,

Vesa K