How can you read datalog files in LabVIEW?

Question

I have a VI that records time and waveform data and writes them as a cluster to a datalog file. I have been unable to read these files in any way, however. I have been working with the datalog examples in LabVIEW, but I have not been able to figure out how to use the Read Datalog File example effectively. Does anyone have any suggestions on how I can either use this example to read waveforms, or how I can design a VI to read datalog files in another way? Thanks.

Answer 1

Hi,
when you read from a datalog file you have to wire to the datalog type input of the Open File function a cluster of the same type as the clusters when you created the file; each cluster is a record.
In the example Write Datalog File Example.vi you see that each record consists of a cluster containing a string and 1D array of DBL; in the Read Datalog File Example.vi a cluster of exactly the same type is wired to the datalog type inputs.
You can use this example to read your datalog files but you must wire to the datalog type input a cluster containing the time data and a waveform data; pratically you have to tell how the data are saved in your file.
I hope I have been clear enough, eventually if you tell me how you save the time data (string, numeric) I
can modify the example to read your datalog files.
Good luck,
Alberto