Stata tip 93: Handling multiple y axes on twoway graphs

摘要

Sometimes users find it difficult to handle multiple y axes on their twoway graphs. The main issue is controlling the side of the graph-left or right-where each axis is placed. Here is a contrived example that exhibits the issue: We might want yaxis(l) to be on the left of the graph and yaxis(2) to be on the right of the graph, but twoway insists on putting yaxis(2) on the left and yaxis(l) on the right. We could achieve what we want by reversing the order of the two plots, but the bars then occlude the lines, and who wants that?