Trying to parse a file-read from text file.vi

[Still-Sigmanut]

I'm attempting to read a txt file that has tab separated data. In the fourth (or any) column is the only data I need. The data is a string of numbers (23.454).

I've used the Read from Text File.vi and the Read From Spreadsheet.vi and I just don't seem to have enough LV background to extract the pertinent  data into a graph. any suggestions?

[Jorge_Amaral]

ok,

That should be very simple.

But if want my help, please attach the text file and I will do an example for you.

Please say what's your labview version, if you need my example.

[Ray.R]

Here is a basic example.  It reads a text file and extracts the 4th column (col 3) and puts the values to a graph.

[altenbach]

Use read from spreadsheet file and you'll end up with a 2D array of numbers. You need two indices to get your value, e.g. row=0, column=3. You can also get the entire fourth column by leaving the row index unwired.

(indices start with zero, so to get the fourth element, use an index of 3)

Do you have an example text file?

[Still-Sigmanut]

Using LV 8.0, have not installed the upgrade yet to 8.2.

Sample file attached..........

[Jorge_Amaral]

hello,

The vi posted can do what you want. I've just saved in 8.0.

[altenbach]

(It is silly to use "delete from array" if all you want is a column. The correct function is "index array")

Joe's idea above basically works fine. Here's a quick adapdation (the node before the graph is "index array" from the array palette.).

Message Edited by altenbach on 06-11-2007 11:57 AM

[Ray.R]

Opps.. my bad..  I'm getting dyslexic with LV!!

Thanks Altenbach!