Hello there,<br><br>I still have a simple coding question...<br><br>So
 essentially, I have a table with 20 columns and 6000 rows. Each row 
represents a volatilty value for a specific time and I have this data 
for ~20 stocks in my specific universe. My question is, how do I create a
 loop in <span class="il">GRETL</span> where I run the Engle-Granger 
test on all possible permutations for each Column (each stock name) and 
output a column with each pair (for example Column A and Column B) and 
the level of co-integration (1- pvalue). <br><br>Ultimately, I would like to be able to see which combination (of stock volatilities) are the most cointegrated.<br><br>Thanks again and I really hope to hear from you soon!<br>

<br>-A