I'm experimenting with a Radar plot. I've got four categories so my
plot looks somewhat like a diamond connecting points on a compass with
North being straight up. Picture also lines draw from North to South
and East to West to form a cross. This is fine but from the middle
point to North, the chart shows percentage 10%, 20%...100%. I don't
want these percetages. If I remove the y-axis, the percentages go away
but so does the cross.

How can I keep the cross but remove the labels?

Thanks.

- John