Urgent, resample input signal

[black_whistler]

Need help, urgent

How to resample the input signal? Not just the sampling rate (samples per second), but also it’s number of samples (samples/cycle)

this is the example:  I read 2 channel (ai0 and ai1) in sampling rate of 50khz and 5000 sample/cycle.  How to resample the ai1 from 50khz and 5000 samples/cycle to be 50khz and 25000 sample/cycle ?

Thanks a lot,

[sergesl]

Hello B.,

I built for you a VI that performs the resampling. It takes a waveform and a target number of samples (at least twice larger than the original number of samples) and performs linear interpolation to resample it. Both the original waveform (indexed 0) and the resampled one (indexed 1) are output in an array of waveforms.
Extract the VIs below in the same directory and run the example one to see how the resample sub VI works.
Hope it helps

[rpursley8]

I use this to get an ideal interpolation.  It works as long as your data file isn't extrememly large (since it requires the use of a FFT).  Essentially you just pad the FFT with zeros and this creates an interpolated signal after the Inv FFT.