How do I limit the number of panels shown on a single page using lattice? I am graphing the results of a regression for multiple states and putting 50 of these on a single page makes them unreadable. I would like to limit the output to 4 wide and as many tall as needed. How do I limit the number of panels shown on a
阅读背景：
用R控制格子图中的面板数量
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