formula node to create a sine wave

[chirs73]

I am trying to create a Sine Wave to display on an XY Graph using a formula node. I've put in my formula which is: Sine=Emax*sin(2*pi*f*t). I am getting a very choppy almost triangular wave displayed on the xy graph. Any suggestions as to how to get it to display a clean waveform.

Thanks

Chirs

[PhillipBrooks]

What are you using to increment the value for 't'?

[johnsold]

Chirs,

How many samples (values of t)  do you have in each cycle of the waveform?  It sounds like you may have a small number.  It takes at least 8-10 samples per cycle to really start to look like a sine and 50-100 to make it look smooth.

Lynn 

[smercurio_fc]

More to the point: why are you using a formula node? This can be accomplished more easily and more efficiently using LabVIEW primitives or with the signal generation functions.

[chirs73]

Here is a screen shot of my program so far.

[chirs73]

I would love to use anything other than a formula node. Also I need to have approximately 10mv resolution on the xy graph.

[altenbach]

Assuming you have more than "LabVIEW base", open your tools palette and have a look at "signal processing...signal generation..sine pattern" 🙂

[chirs73]

I wish I could use those. But I have to do this in a formula node. That is the requirement given to me.

[smercurio_fc]

Is this homework? Cause if it's for work, whoever gave you that requirement should ... I won't go there.

[chirs73]

This is homework. As I said in prior postings I am not getting a clean sinewave displayed on the XY graph. It looks almost like a triangular waveform.