How to Change Table Background with tableGrob in GridExtra

Question

I have this Gridmesh in the Background of my plottet table. How do i Change the Background other then with theme

https://imgur.com/a/6s5tM0j

cor.t=mydata

tt3 <- ttheme_minimal(
base_size = 8,
core=list(bg_params = list(fill = paste(substr(HeaderFarbe[n+1],
start = 1, stop = 7),"4D",sep=""),
col=HeaderFarbe[n+1]),
fg_params=list(fontface=3)),
colhead=list(fg_params=list(col=HeaderFarbe[n+1], fontface=4L)),
rowhead=list(fg_params=list(col="red", fontface=3L)))

plot(tableGrob(cor.t ,theme=tt3))

Answer 1

There's no background if you use grid::grid.draw(tableGrob()) (or grid.table() directly). plot.gtable , adding the grey background, is meant for debugging only.