Hi,
good point. But we have some noise, so low pass filtering is really
desirable. I will try the two-step process.
Thanks a lot,
Matthias
One further question regarding spline: Is that suitable when I try to
drastically reduce the sampling frequency of my data? I.e., I have
data at 1 kHz, and reduce it to 5 Hz. Linear interpolation just
interpolates between the two neighbouring points AFAIK. What about
splines in this context?
Matth
In your case (with a very high decimation order), linear interpolation
may be a good choice, assuming that the bandwidth of your signal is
low compared to the input sample rate.
Another idea, if you really need the aliasing rejection that the FIR
filter mode offers you AND your sample rate of 1 kH
Yes the three other options "coerce", "linear" and "spline" all work
for un-equally spaced (XY type) input data. Actually the FIR option
should have been disabled and grayed-out. Thank you for pointing that
out.
Hi LocalDSP,
I will try spline. So for x/y-pairs, coerce, linear and spline are
supported?
Thank you very much for your fast help!
Regards,
Matthias
The FIR Filter mode interpolation only works for equally spaced input
samples. So the feature is not supported when the input signal is XY
data. The default used is, as you noticed, linear interpolation.
I'll suggest you to try the Spline (cubic) interpolation as an
alternative. It is a good alrou
Hi all,
I am currently trying to resample x/y-data. In the waveform utilities,
there is a polymorphic routine that is able to perform resampling on
pairs of x and y arrays. So far, that's fine.
However, when using the waveform version of the polymorphic vi, I can
set i.e. FIR filtering and the co
