tableGrob: set the height and width of a grid.table - r

Question

I'm trying to make a function that will give me a plot ready for indesign, illustrator or inkscape. In trying to do so, I have 2 problems I cannot solve.
1) set the width and height of my plot (or just the grobTable):
The output I get is very small and when upscaling it in illustrator the font follows and become way to big. Therefore I want to make plots with manually defined widths and heights.
2) Sometimes the title, note and rownames gets "misplaced" (see the difference between plot 1 and 2 for details). It happens when the rownames are short.
library(gridExtra)
library(ggplot2)
data(diamonds)
## plot function
kryds.row <- function(x,y, p=100, decor="%", digits=3,
titel="", note="", red=219, green=55, blue= 153){
c <- table(x, y)
s <- as.character(sum(c))
s <- paste("Antal svarpersoner=", s, sep=" ")
j <- prop.table(c,1)
r <- c(rownames(j),"Total")
k <- c(colnames(j), "Total")
j <- addmargins(j, margin =2, FUN = sum)
j <- round(j, digits)
j[]<-paste(j*p, decor, sep=" ")
farve <- rgb(red,green,blue, maxColorValue =255)
table <- tableGrob(j,
cols = k,
gpar.coretext = gpar(fontsize = 12),
gpar.coltext = gpar(fontsize = 12,col="white"),
gpar.rowtext = gpar(fontsize = 12, fontface="bold"),
gpar.corefill = gpar(fill = rgb(255,255,255, maxColorValue =255), alpha = 1, col = NA),
gpar.rowfill = gpar(fill = rgb(255,255,255, maxColorValue =255), alpha = 1, col = NA),
gpar.colfill = gpar(fill = 0, alpha = 1 ,col= "white"),
equal.width = TRUE,
show.rownames = TRUE,
show.rsep = TRUE,
show.hlines = TRUE,
show.csep = FALSE,
show.vlines = FALSE,
show.box = FALSE,
padding.h = unit(15, "mm"),
padding.v = unit(8, "mm"),
core.just = "center",
row.just = "left",
separator = farve)
hh <- grobHeight(table)
ww <- grobWidth(table)
border <- roundrectGrob(x=0.5, y=0.5, width=ww, height=hh,
default.units="npc",
r=unit(0.1, "snpc"),
just="centre",
name=NULL, gp=gpar(col="white", fill=farve, vp=NULL))
border2 <- roundrectGrob(x=0.5, y=0.5, width=ww, height=hh,
default.units="npc",
r=unit(0.1, "snpc"),
just="centre",
name=NULL, gp=gpar(fill=NA, col=farve, vp=NULL))
title <- textGrob(titel,
x=unit(0.5,"npc") -0.5*ww + unit(5, "mm"),
y=unit(0.5,"npc") +0.5*hh + unit(2, "mm"),
vjust=0,hjust=0, gp=gpar(fontsize=12, fontface="bold"))
footnote <- textGrob(note,
x=unit(0.5,"npc") - 0.5*ww + unit(5,"mm"),
y=unit(0.5,"npc") - 0.5*hh,
vjust=1, hjust=0,gp=gpar( fontsize=10))
svarpersoner <- textGrob(s,
x=unit(0.5,"npc") + 0.5*ww -unit(5, "mm"),
y=unit(0.5,"npc") + 0.5*hh + unit(2, "mm"),
vjust=0, hjust=1,gp=gpar( fontsize=10))
grid.newpage()
gt <- gTree(children=gList(border,table,border2, title, footnote, svarpersoner))
grid.draw(gt)
}
# Plot it
kryds.row(diamonds$color, diamonds$cut, titel="title", note="note") # plot 1
kryds.row(diamonds$cut, diamonds$color, titel="title", note="note") # plot 2
# Problems
#1: The title, note and the j in the row.text is very badly placed in plot 1 but not plot 2
#2 I cannot set the width and height of my table
I have not cleaned up in my code yet, so please bare with it!

Answer 1

The current version of gridExtra::tableGrob doesn't let you set the widths/heights. You can however try a different (experimental) version of tableGrob built from scratch using gtable.
#library(devtools)
#install_github("tablegrob", "baptiste")
require(tablegrob)
d <- iris[sample(seq.int(nrow(iris)), 6),]
grid.newpage()
pushViewport(viewport(height=0.8,width=0.9))
g2 <- tableGrob(d, rows=NULL,
widths=unit(1,"null"), heights=unit(1/(nrow(d)),"npc"))
grid.draw(g2)
grid.roundrect(y=unit(0,"line"), height=unit(1,"npc") +unit(1,"lines"),
just="bottom", r=unit(0.05, "snpc"))
Edit (08/2015): you can now edit the widths/heights, since grid.table is now based on gtable.

Answer 2

The solution I went with was to manipulate the length of the levels like this:
longest <- 0
longestnumber <- 0
for (i in 1:length(levels(x))){
if (longest < nchar(levels(x))[i]){
longest <- nchar(levels(x))[i]
longestnumber <- i
}
}
for (i in 1:(100-longest)){
levels(x)[longestnumber] <- paste(levels(x)[longestnumber], " ", sep="")
}
That way I can control the width of the table