Jim Lemon wrote:
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?
I think historical.
Replacing
return R_NilValue;
by
return at;
in do_axis (plot.c) should do the trick (well, I'm a bit afraid concerning the UNPROTECT, you might need to do that later, after the recording stuff?).
Uwe Ligges
Jim
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