compare times while ignoring the date

[WayneS1324]

I have this...

'In Range?' is always false no matter what the current time is. I'm guessing this is because the date is included in the compare function.

I need to compare these times and ignore the date. I cant seem to find a way around this. The times will be the same everyday and I'd like for them

to be constants.

Any help?

Thanks.

[GerdW]

Hi Wayne,

you should set the date of the comparing "constants" to match the date of the "current time":

[Tim_W. · Accepted solution]

Try formatting the date into a string that does not include the day (only the hours and minutes).

Tim W.

Applications Engineering

National Instruments

http://www.ni.com/support 

[Tim_W.]

Found a small problem with my posted code, the inputs on the In Range and Coerce function need to be in the format HH:MM, not H:MM (7:15 should be formatted as 07:15)

Tim W.

Applications Engineering

National Instruments

http://www.ni.com/support 

[WayneS1324]

Thanks Gerd and Tim.

I would not have though of trying to compare strings that way. The inrange and coerce knows its a time?

[GerdW]

Hi Wayne,

InRange will check strings only by usual character order, thus you need to format the hour as 2-digit number...

[Chris_Cilino]

Here's a different approach. What do ya'll think?

[GerdW]

Hi Chris,

what about this:

Seems simpler than to convert to a cluster, unbundle some data and applying more math to them…

[RavensFan]

That won't work if you aren't in GMT and you are trying to compare times of day.

Let's say it is currently 11 pm.  I want to see if it is after 6pm.  I'm in eastern daylight savings time.

6pm today would give me a value that is higher (thus later) than 11 pm.

Luckily LabVIEW has this nice feature called subVI's that can hide the ugly parts of Chris's method and lets you reuse it.  😜

[crossrulz]

---

@RavensFan wrote:

That won't work if you aren't in GMT and you are trying to compare times of day.

---

That's why time zones and Daylight Savings Time should be banned and everybody just uses UTC.