If you want to see whether a correlation exist between two signals, you can use the SIMEQ function corr10:
>> corr10('Leading Tag' , 'Trailing Tag' , 'From' , 'To', DelaySeconds)
Suppose you do not know the transport time in
the sample lines for the preheater top gasanalyser.
will calculate the correlation between the
riser pipe pressure drop and the O2 measurement in the preheater using
As can be seen, a strong correlation exist,
and the O2 signal is opposite proportional to the riser pipe pressure
The corresponding trend plot of the same hour
is shown below. It is not easy to see the correct delay.
As usual, correlations should be treated with
respect. The existence of a high correlation does not mean a
Mostly the correlation can be used to
estimate how much a given signal influences another if you already have