RE: [R] Getting tick positions

From: Jim Lemon <bitwrit_at_ozemail.com.au>
Date: Thu 03 Mar 2005 - 09:56:19 EST


Thanks for the answers - I should have been more specific as I had already tried axTicks and pretty.

The function in question is gantt.chart() in the latest plotrix package (Thanks to Scott Waichler for the original code). I settled on axis.POSIXct as it seemed the most appropriate for this function, but couldn't find a way to get the positions of the ticks so that I could then draw grid lines along the months|days|hours. While the trick of copying the original function works, I wondered why the axis* functions don't return the tick positions as barplot returns the bar positions. Is there any reason not to return "z", or is it just historical?

Jim



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