Hi,
I want to produce two parallel rotated strips with color gradient. So  
far, the sample strip is something produced by this:

pushViewport(viewport(x = unit(0.638, "npc"), y =unit(0.386, "npc"),  
width=.62, height=0.006, angle=137.2))
grid.rect(y=100:1/100, just="top",
          gp=gpar(col=NA,
                  fill=colorRampPalette(c("lightgray", "white"),
                                        space="Lab")(200)))

I want a same one parallel to it to the right.

I've tried something like:

pushViewport(viewport(x = unit(c(0.638, 0.648), "npc"), y  
=unit(c(0.386, 0.386), "npc"), width=unit(c(.62, .62) , "npc"),  
height=unit(c(0.006, 0.006), "npc"),  angle=137.2, layout  
=grid.layout(1,2)))

grid.rect(y=100:1/100, just="top",
          gp=gpar(col=NA,
                  fill=colorRampPalette(c("lightgray", "white"),
                                        space="Lab")(200)))

grid.rect(y=100:1/100, just="top",
          gp=gpar(col=NA,
                  fill=colorRampPalette(c("lightgray", "white"),
                                        space="Lab")(200)))

Or

vpList(pushViewport(viewport(x = 0.638, y = 0.386, width=.62,  
height=0.006, angle=137.2)))

grid.rect(y=100:1/100, just="top",
          gp=gpar(col=NA,
                  fill=colorRampPalette(c("lightgray", "white"),
                                        space="Lab")(200)))

But kept getting error messages.

Would someone please give me some hint?

Thank you very much!!
Kexin


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