Transforming a Sine wave in a rectified sine wave

[icamaster]

Hi there!

I am trying to make a VI where I transform a plain sine wave into a rectified one. Can anyone tell me why this is not working?

[Gregory · Accepted solution]

You only have a single value coming out of your "less than zero?" node. That means it is making a single decision, so I think it looks at the average of the Y array and determines if it's less than zero. You really want to go on an element by element basis. So use "get waveform components" to get the Y array, put it into a For Loop, and try your logic again. Then  "build waveform" using your previous waveform and only bundling in the new Y array.

[Gregory]

I think this will also do what you want:

[altenbach]

What's wrong with the absolute value function?

[icamaster]

Yes, it was so obvious. This did the trick, thank you!

[altenbach]

---

@icamaster wrote:

Yes, it was so obvious. This did the trick, thank you!

---

Hopefully you are not really going to do whatever you marked as solution above :o.

[icamaster]

Your solution was fine for Full-Wave but I also want a Half-Wave, which takes only positive values. 

[altenbach]

That's the first time you mention half-wave. How are we supposed to guess that?

But even for half-wave you don't need a FOR loop.