| T O P I C R E V I E W |
| Fabrice Malacrida |
Posted - 06/06/2011 : 12:59:58 PM
Hello,
I am trying to correlate two signals i recorded (Signal 1 = f(Signal 2)). Problem is, the two signals are not recorded at the same interval and both frequencies vary. I.e. Signal 1 is recorded every 15+-0.1 s and Signal 2 is recorded every 3+-0.05 s. Is there a (relatively simple) way to correlate both signals using a graph or an analyse algorithm?
The timestamps are expressed in dd/mm/yyyy hh:mm:ss.ss
Tx in advance for your replies or a link to a similar topic
Fabrice |
| 2 L A T E S T R E P L I E S (Newest First) |
| Fabrice Malacrida |
Posted - 06/08/2011 : 02:24:57 AM
Thank you greg for the solution; it worked perfectly |
| greg |
Posted - 06/07/2011 : 4:45:28 PM
You can use Analysis : Mathematics : Interpolate/Extrapolate Y from X to generate new Y values for your 'coarse' signal at the same X (date-time) values as your 'fine' signal. The new Ys can be generated using Linear, Cubic Spline or Cubic b-Spline. Then run correlation on the original 'fine' Y and the new 'fine' Y. |
