[R] Three horizontal axes OR Two axes on same side?

Rafael Jimenez rjimenez at caminos.upm.es
Thu Jan 11 11:44:45 CET 2007

Dear list:

I need to reproduce a plot with three different horizontal axes.

I know how to make plot with two different horizontal axes (one
above, one below) using axis():
   axis(1, ....)
   axis(3, ....)

However, I don't know how to produce two axes on the same side of the

Any pointers or examples?

R. Jimenez

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