How to rotate the x-axis labels 90 degrees in levelplot

Question

I\'m trying to visualize a correlation map, and I think that I\'ve gotten it to work, except for the jumbling of the x-axis labels. Any suggestions for how to rotate them? S

Answer 1

As far as the rotation of the x-axis labels go, you have to use parameter scales (see ?xyplot for more information on lattice parameters). You want to modify only its x component: scales=list(x=list(rot=90)). In context:

levelplot(cor2,
          aspect="iso", scales=list(x=list(rot=90)),
          main="Correlation Matrix", col.regions=rgb.palette(120),
          cuts=100, at=seq(0,1,0.01))