I have a dataset block, I call it A.
A is the actual data, which is large.
Then I have A_1, A_2, ... A_3,....A_n which are simulated, smaller blocks of data that have the same # of columns as A but a lot less rows than A. (n=1000, say).
I want to regress using the dataset that has A_1 appended to A.
Then, repeat with A_2 appended to A, until A_n appended to A.
Is there any good way to do this as efficiently as possible, without appending the data A_1,...., A_n to A through a loop data step and performing regression?
Thank you.
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