Phase between two waveforms

I'm trying to figure out the phase difference between two waveforms I downloaded from an oscilloscope. They are 1X2500 matricies. Here's the code I'm using (w1 and w2 are two waveforms I got from the oscilloscope with the getWaveform command)

CosTheta = dot(w1,w2)/(norm(w1)*norm(w2));
ThetaInDegrees = acosd(CosTheta)

This only gives me the absolute value of the phase. I don't know if it's negative or positive. How could I get this answer?

Thanks!

[John BG]

is it possible for you to show the signals?

Answer 1

[Star Strider]

The sign of the phase depends on the waveform you use as the reference. The xcorr function could help you decide that.

EDIT — (15 Jul 2016 16:15 UTC)

They appear to be slightly different frequencies. They will never have a constant phase relationship.

[John BG]

if

w1=2*pi*f1*t+ph1 
w2=2*pi*f1*t+ph2

these 2 signals may have same frequency but may also have different relative phase, that can be constant or not.

So I doubt, without further information, that the frequencies are categorically different and therefore one cannot say that 'they will never have constant (relative) phase'

[Star Strider]

You didn’t see the original waveforms. That file may have been deleted in the interim to conserve space on the server.

Second-guessing is worthless if you don’t have the original data.

[John BG]

' .. 1X2500 matricies..' out of an oscilloscope, may have been deleted, but no one know the size, correct?

Have you seen them? if so can I have a look?

Anyway, I agree, 2nd guessing is pointless.

[Star Strider]

The file was posted. I did not keep a copy of it.