Write arrays into a text file in different columns at different times

Hi,
I have a problem write data into a text file. I want to write 4 1D arrays into a text file. The problem is that I need to write it at different time and in different column (in other word, not only append the arrays).
Do you have an idea to solve my problem?
Thank you

A file is long a linear string of data (text). In order ro insert columns, you need to rewrite the entire file, because colums are interlaced over the entire lenght of the file.
So:
read file into 2D array
insert columns using array operations
write resulting 2D array to file again.
(Only if your colums are guaranteed to be fixed width AND you know the final number of colums, you could write the missing columns as spaces and then overwrite later. Still, it will be painful and inefficient, because column data are not adjacent in the file.)
LabVIEW Champion . Do more with less code and in less time .

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Merge Fast Data.vi ‏67 KB

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Item Code -- dbo.Table.ItemCode -- Position 11 to 25 - 14 characters
Client Code -- dbo.Table.CardCode -- Position 26 to 36 - 10 characters
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JFOTST.dbo - Database Name.
OINV - Table
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Once again thank you very much for all your help.
Together we are stronger!
Kind Regards,
Miguel Barbosa
Edited by: Miguel Barbosa on Aug 18, 2009 12:09 PM
Edited by: Miguel Barbosa on Aug 18, 2009 12:10 PM

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Write arrays into a text file in different columns at different times

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