I see what you're trying to do, almost

How do you decide what filename gets what columns?

Based on your sample data, these are two rows (headers then rows) that go into three files , this is how you're wanting to split that up 

<GSOR>    vnir_1 vnir_2 vnir_3 
<GSOR>  vnir_4 vnir_5    vnir_6 
<GSOR>  vnir_7 vnir_8    vnir_9

[download]

This is the first data row split up and ready to end up in three different files

310015    0.37042    0.36909    0.36886    
310015    0.36698    0.36615    0.36449
310015    0.36404

[download]

What is the filename for the first 3 columns? Second 3 columns? Last "3" columns? And this is repeated for every row in the original data?

In reply to Re^4: Split a large text file by columns by Anonymous Monk
in thread Split a large text file by columns by tc

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