Combining data files

Question

Hi,
I tooks data from hardware and saved it as a series of small files so I would not be stuck with huge files. Now I want to put together some of these files. I have the files as data_001.lvm, data_002.lvm, data_003.lvm etc. I have tried using the merge files option but it put the data side by side. I want this data to be output in the same columns so that I have  a column with all the time data and a column with all the sampled amplitudes.
I have attached 2 exapmles of the data files. I am using Labview 7.0.
Thanks, Magreen
Attachments:
data_001.txt ‏525 KB
data_002.txt ‏534 KB

Answer 1

As I said, the file IO has changed quite a bit since LabVIEW 7.0. Since my VI is in LabVIEW 8.5, you won't be able to open it.
Still you should be able to create it from scratch.
Create a while loop
define the folder containing your file (e.g. using  the file dialog or a diagram constant).
Open a new file for the output.
In the loop, create the file names according to the format pattern
If the file does not exist (e.g. "file info" generates an error), do nothing and stop the loop
if the file exists, read as a plain text string and append it to the new file.
Repeat until you run out of matching files.
Close the new file.
(You could also use "list files" with e.g. "data_*.txt" as pattern and simply autoindex over the file names in a FOR loop.)
See how far you get. If you think you are close, attach your work and we find out what else is needed.
Message Edited by altenbach on 08-15-2008 11:00 AM
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