LabVIEW

cancel
Showing results for 
Search instead for 
Did you mean: 

Extract some records of Datalog file

I create a record for datalog file like struct { timestamp; value}, and I want to read the records within a specifice period into a Chart graph.

 

for example, I stored the data in 2011/10/5 12:00:00 t0o 2011/10/7 12:00:00, but I only want to read the value in 2011/10/6 11:00:00 to 2011/10/7 11:00:00, now I know how to read the data within

the time sector.

 

Now I have the begin time and end time, how can I use the time as X scale, while the corresponding value showed on the Chart graph?

 

 

0 Kudos
Message 1 of 3
(1,316 Views)

Something like this?  (Sorry, I didn't include how to get the data into the cluster fromat because LV 7.1 has a bug that makes it difficult to convert a string to a timestamp.)

Bill
CLD
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.
Humble author of the CLAD Nugget.
0 Kudos
Message 2 of 3
(1,309 Views)

If the data was stored in Array format, Index array vi could be used to select the information you want;

 

Otherwise, the true/ false case structure will be better choice, just like sf said~

0 Kudos
Message 3 of 3
(1,304 Views)