>qplot(data,uempmed,data = economics,geom = "line")
Don't know how to automatically pick scale for object of type function. Defaulting to continuous.
Error: Column `x` must be a 1d atomic vector or a list
这段代码一直显示错误,我复制别人的代码就正确 自己打的错误 这是为什么呀


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