I am using R and Latex together to draw some plots and am trying to make a common legend for all of them.
I have six separate plots on the same page. I made each plot separately in R and then displayed them on the same page using \includegraphics in Latex.
Each graph has the same legend information, so rather than having a legend in each plot I would like to have one horizontal legend on display at the bottom of page. Unfortunately, I can't figure out how to make a legend without a plot. Once I have a separate image for the legend, I will know how to include it at the bottom of the page using Latex.
The code I am trying to use to make the legend is
plot(1, type = "n", axes=FALSE, xlab="", ylab="")
plot_colors <- c("blue","black", "green", "orange", "pink")
legend(.6,1.3,legend = c("Fabricated Metal", "Iron and Steel", "Paper",
"Beverages", "Tobacco"),
col=plot_colors, lwd=5, cex=.5, horiz = TRUE)
But, the font is too small and the side of the legend box is cut off.
A simple example of what I was talking about:
m <- matrix(c(1,2,3,4,5,6,7,7,7),nrow = 3,ncol = 3,byrow = TRUE)
layout(mat = m,heights = c(0.4,0.4,0.2))
for (i in 1:6){
par(mar = c(2,2,1,1))
plot(runif(5),runif(5),xlab = "",ylab = "")
}
plot(1, type = "n", axes=FALSE, xlab="", ylab="")
plot_colors <- c("blue","black", "green", "orange", "pink")
legend(x = "top",inset = 0,
legend = c("Fabricated Metal", "Iron and Steel", "Paper","Beverages", "Tobacco"),
col=plot_colors, lwd=5, cex=.5, horiz = TRUE)
Try this,
plot_colors <- c("blue","black", "green", "orange", "pink")
text <- c("Fabricated Metal", "Iron and Steel", "Paper",
"Beverages", "Tobacco")
plot.new()
par(xpd=TRUE)
legend("center",legend = text, text.width = max(sapply(text, strwidth)),
col=plot_colors, lwd=5, cex=1, horiz = TRUE)
par(xpd=FALSE)
来源:https://stackoverflow.com/questions/10389967/common-legend-for-multiple-plots-in-r