R help - Jan 1999 - axis labels and ticks in persp

1. This doesn't work
persp(x,y,z,col="grey",xlab="x",ylab="y",zlab="z")
but I can get axis lables on x and y by
persp(x,y,z,col="grey")
title(xlab="x", ylab="y")
BUT I can't figure out how to get a label for z. How to do it?

2. To be be consistent with image(), I think persp should make z the axis
it now calls y (and vice versa). By this I mean that image() is just a
view of the same object except from exactly overhead (on the z axis), and
this z axis is called y by persp.

3. How can I get ticks and associated tick labels on all the axes as is
done by default by plot(x,y) or image(x,y,z)?

Thanks very much for any help!

Bill Simpson

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> 2. To be be consistent with image(), I think persp should make z the axis
> it now calls y (and vice versa). By this I mean that image() is just a
> view of the same object except from exactly overhead (on the z axis), and
> this z axis is called y by persp.
Sorry, I see now that this behaviour is caused by
title(ylab="y")
which just puts the y-axis label in the wrong place for a 3D plot
(persp's z-axis). So this method of adding axis labels doesn't work very
well for persp() plots.

Bill

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