unable to read the frequency!

[dancrilly]

my programe reads in off an lvdt transducer through a labjack my programe works up until the LJ stream graph process reads to "scaled data v's seconds" graph.where it graphs a sin wave (amplitude vs time)

for some reason the "freq. amp." analyser won't read the frequency correctly. when i run the programme it outputs a frequency of zero.
note: the amplitude is reading correctly

[LocalDSP]

Your actual data are not accessible and the sub-VI is missing. If you could re-post your VI with time data saved as default on your graph that would be helpful.

In the mean time ... few comments:
- You are attempting to display Amplitude vs. Frequency on an XY-graph. However your graph "data" are just two scalars representing respectivelly the single value amplitude and the single value frequency. This will only give you one point on your graph.

- What exactly are you trying to display? A set of multiple amplitudes vs.frequencies? The spectrum of your signal?