[R] Undesired tick marks on top, right axes

[Rich Shepard]

On Tue, 11 Sep 2018, Bert Gunter wrote:

> Adding
> tck = c(1, 0)
> to the "scales ="  list will probably solve your problem.

Bert,

   How interesting. This removed the tick marks on top but left them on the
right axes. Will think more about this.

Regards,

Rich