How to add more samples to a waveform

[Flamboyant]

I have a waveform of 100 samples. I want to make the no: of samples to 1000 without changing the shape of the waveform. How can I do this.

[Davidek · Accepted solution]

Hi

The Append Waveforms.vi. You can find it in the Functions palette under Programming->Waveform->Analoge Wfn.

Make sure you read the help concerning how the dt and t0 of the waveforms you are appending behave.

Best Regards

David

NISW

[Flamboyant]

I am not trying to append two waveforms. I just to increase the number of samples in the exixting waveform without affecting its shape. To be more clear just the opposite of Decimation.

[Davidek]

Oh, so you want to interpolate to get an additional 900 samples in the same timeperiod? Is that what you want to do?

Best Regards

David

[Flamboyant]

Exactly..........

[My NI]

Hi Cooldude,

But what extra values should be allocated to the 900 samples? They do not exist actually.

[Flamboyant]

I don't know whether it is possible. I am just checking out whether this is possible without affecting the shape of the waveform

[Davidek]

Hi

Something like this could do the trick.

You would just have to build the X array from dt and t0 and also the Xi array with the new X values you want new Y values for. Standard interpolation

Best Regards

David

Message Edited by Davidek on 08-06-2009 04:03 AM

[Davidek]

oh, and you would have to input the new dt into the build waveform as well. Sorry, forgot that part

/David

[My NI]

Hi David,

that is amazing