| T O P I C R E V I E W |
| kitzbrado |
Posted - 03/26/2008 : 09:58:43 AM
Origin Version (Select Help-->About Origin): Origin 8
Operating System: Windows XP
I want to do Fast Fourier transform (FFT) on data where X points are neither equidistant nor is the number of those points 2^n. Can somebody please tell me how Origin handles such data and what details I have to be careful about?
Specifically, the resolution in X domain is huge (compared to the interesting frequencies) so, in principle, it might be possible to erase some points to obtain equidistant points; if that would improve the results.
I have checked help but didn't learn much about it. |
| 1 L A T E S T R E P L I E S (Newest First) |
| Leo_Li |
Posted - 03/27/2008 : 12:23:36 AM
hello,
Good news is that Origin8 supports FFT on number of data point not equaling to 2^n.
In order to get equidistant X, you may want to try "interpolation", this tool can also help you "erase" some points...
Leo
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