Subtracting a time stamp from another time stamp...

[Share_Good]

hi...

take a look at the attached VI.

should give me only 0,006 sec or 0,007 sec

but gives me 1hr 0min 0,006 sec...how?

[devchander]

If u observe the output of subtraction function, it will show '0.0069999' or 6-7 milliseconds as the difference ( which is what you expect)

But then, you are converting that into timestamp which is the time-zone-independent number of seconds that have elapsed since 12:00 a.m., Friday, January 1, 1904, Universal Time.

Hence the incorrect result

[Share_Good]

Hi Dev...

thanks a lot...

i did realize that the difference is correct in terms of float.
but i was unaware that the time stamp is time-zone-independant.

i tried by changing the timezone...it worked perfect...

now it is clear to me... thanks...

[smercurio_fc]

Interestingly enough, on my system I get something completely different:

Amusing.


Message Edited by smercurio_fc on 08-06-2008 10:58 AM

[johnsold]

I think you sent a negative number to the timestamp indicator? Some combination of the difference, daylight savings time and time zones.

Lynn

[tst]

If you want to see the relative time, you need to create a DBL indicator after the substraction, right click it, select Display Format... and change the format to relative time.

[smercurio_fc]

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@johnsold wrote:
I think you sent a negative number to the timestamp indicator? Some combination of the difference, daylight savings time and time zones.

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To be honest, I didn't investigate it. I was just curious to see what would happen, and I just left it at that.