I have two plots that share the same legend. I want to present them side-by-side with one legend, but I would like the left plot to be narrower than the right plot.
If I use grid_arrange_shared_legend, I can't control the individual plot widths:
library(ggplot2)
library(gridExtra)
library(grid)
cbPalette <- c("#d52b1e", "#176ca4", "#f7761b", "#734e9e", "#176ca4", "#f7761b", "#734e9e")
plotMeanShapes = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7")) +
theme(legend.position="none")
plotIndShapes = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7")) +
theme(legend.position="none")
plotMeanShapesLegend = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7"))
grid_arrange_shared_legend <- function(..., ncol = length(list(...)), nrow = 1, position = c("bottom", "right")) {
plots <- list(...)
position <- match.arg(position)
g <- ggplotGrob(plots[[1]] + theme(legend.position = position))$grobs
legend <- g[[which(sapply(g, function(x) x$name) == "guide-box")]]
lheight <- sum(legend$height)
lwidth <- sum(legend$width)
gl <- lapply(plots, function(x) x + theme(legend.position="none"))
gl <- c(gl, ncol = ncol, nrow = nrow)
combined <- switch(position,
"bottom" = arrangeGrob(do.call(arrangeGrob, gl),
legend,
ncol = 1,
heights = unit.c(unit(1, "npc") - lheight, lheight)),
"right" = arrangeGrob(do.call(arrangeGrob, gl),
legend,
ncol = 2,
widths = unit.c(unit(1, "npc") - lwidth, lwidth)))
grid.newpage()
grid.draw(combined)
# return gtable invisibly
invisible(combined)
}
ppi <- 600
pageWidth <- 5.75
pageHeight <- 3.5
png("shapesArranged1.png", width = pageWidth, height = pageHeight, units = 'in', res = ppi)
grid_arrange_shared_legend(plotMeanShapes, plotIndShapes, ncol = 2, nrow = 1, position = "right")
dev.off()
I've tried to control individual plot widths using layout_matrix in arrangeGrob, but it doesn't work:
library(ggplot2)
library(gridExtra)
library(grid)
cbPalette <- c("#d52b1e", "#176ca4", "#f7761b", "#734e9e", "#176ca4", "#f7761b", "#734e9e")
plotMeanShapes = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7")) +
theme(legend.position="none")
plotIndShapes = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7")) +
theme(legend.position="none")
plotMeanShapesLegend = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7"))
grid_arrange_shared_legend <- function(..., ncol = length(list(...)), nrow = 1, position = c("bottom", "right")) {
plots <- list(...)
position <- match.arg(position)
g <- ggplotGrob(plots[[1]] + theme(legend.position = position))$grobs
legend <- g[[which(sapply(g, function(x) x$name) == "guide-box")]]
lheight <- sum(legend$height)
lwidth <- sum(legend$width)
lay <- rbind(c(1,1,2,2,2,2))
gl <- lapply(plots, function(x) x + theme(legend.position="none"))
gl <- c(gl, ncol = ncol, nrow = nrow)
combined <- switch(position,
"bottom" = arrangeGrob(do.call(arrangeGrob, gl, layout_matrix = lay),
legend,
ncol = 1,
heights = unit.c(unit(1, "npc") - lheight, lheight)),
"right" = arrangeGrob(do.call(arrangeGrob, gl, layout_matrix = lay),
legend,
ncol = 2,
widths = unit.c(unit(1, "npc") - lwidth, lwidth)))
grid.newpage()
grid.draw(combined)
# return gtable invisibly
invisible(combined)
}
ppi <- 600
pageWidth <- 5.75
pageHeight <- 3.5
png("shapesArranged1.png", width = pageWidth, height = pageHeight, units = 'in', res = ppi)
grid_arrange_shared_legend(plotMeanShapes, plotIndShapes, ncol = 2, nrow = 1, position = "right")
dev.off()
I've tried using grid.arrange instead, but when I save the figure as a png, the legend comes out huge:
cbPalette <- c("#d52b1e", "#176ca4", "#f7761b", "#734e9e", "#176ca4", "#f7761b", "#734e9e")
plotMeanShapes = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7")) +
theme(legend.position="none")
plotIndShapes = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7")) +
theme(legend.position="none")
plotMeanShapesLegend = ggplot(diamonds, aes(clarity, fill = color)) +
geom_bar() +
facet_wrap(~cut, nrow = 1) +
scale_fill_manual(values=cbPalette, name="condition", labels = c("really really long text", "2", "3", "4", "5", "6", "7"))
library(gridExtra)
g_legend<-function(a.gplot){
tmp <- ggplot_gtable(ggplot_build(a.gplot))
leg <- which(sapply(tmp$grobs, function(x) x$name) == "guide-box")
legend <- tmp$grobs[[leg]]
legend
}
legend <- g_legend(plotMeanShapesLegend)
ppi <- 600
pageWidth <- 5.75
pageHeight <- 3.5
lay <- rbind(c(1,1,2,2,2,3))
grid.arrange(plotMeanShapes, plotIndShapes, legend, layout_matrix = lay)
png("shapesArranged2.png", width = pageWidth, height = pageHeight, units = 'in', res = ppi)
grid.arrange(plotMeanShapes, plotIndShapes, legend, layout_matrix = lay)
dev.off()
I would like the width control of grid.arrange with the sensible legend size/placement of grid_arrange_shared_legend.
