有感于：CREATE NEW VARIABLE

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Hello ! If I want to create a new variable which is  1 1 2 2 3 3 4 4 .... 2000 2000 ,how can I use the program ??

Please help me to solve the question !!  Thank you  very much ...

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Imasasor 的解答：
do i=1 to 2000;
output;
output;
end;

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小结：
每使用一次output，就将当前循环中i的值输入到数据集中。