Hi, there:
Suppose I want create variables with indexes in their names, e.g., X_1_1,
X_1_2, X_1_3, ..., X_1_10, X_2_1, X_2_2, X_2_3, .. X_2_10,..., X_10_1, X_10_2,
... X_10_10. It looks like I need to use 2 indexes I and J so I is looped from
1 to 10, and J is looped from 1 to 10. But I don't know how to automatically
produce X with these combination of indexes. Should I use paste function? Can
someone help?
Thanks.
Yulei
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