對齊圖例表/矩陣中的文本和行

Question

我正在嘗試在圖例中對齊表格（由矩陣定義）中的線條和文本。

到目前為止我已經嘗試過：

plot(1,type="n",col=2)
legend_order <- matrix(1:12,ncol=3,byrow = TRUE)
legend("topright",
ncol=3,
legend=c("","long label 1","long label 2",
"T=1","","",
"T=2","","",
"T=3","","")[legend_order],
lty=c(0,0,0,0,1,1,0,1,1,0,1,1)[legend_order],
col=c(0,0,0,0,2,5,0,3,6,0,4,7)[legend_order])

在這里我們可以看到“長標簽 1”和“長標簽 2”沒有與彩色線條對齊。 “T”的左邊也有一個間隙。

你如何將文本與線條對齊？

Answer 1

我們可以使用adj 。 閱讀更多?legend ；

plot(1,type="n",col=2)
legend_order <- matrix(1:12,ncol=3,byrow = TRUE)
legend("topleft",
       ncol=3,
       legend=c("","foo","bar",
                "T=1","","",
                "T=2","","",
                "T=3","","")[legend_order],
       lty=c(0,0,0,0,1,1,0,1,1,0,1,1)[legend_order],
       col=c(0,0,0,0,2,5,0,3,6,0,4,7)[legend_order],
       adj = 2)

Answer 2

您可以使用透明bty='n'圖例覆蓋基本legend ，並使用adj=進行微調。

plot(1, type="n", col=2)
legend('topright', legend=rep('', 9), lty=c(rep(NA, 3), rep(1, 6)), title='',
       ncol=3, col=c(rep(NA, 3), 2, 5, 3, 6, 4, 7))
legend('topright', legend=c(paste0('T=', 1:3), rep('', 6)), title='', bty='n', 
       adj=.3, ncol=3, col=c(rep(1, 3), rep(NA, 6)))
legend('topright', legend=c('', 'foo', ' bar'), adj=.6, bty='n', ncol=3, 
       col=c(rep(1, 3), rep(NA, 6)))

更新

為了更加靈活，您可以使用par()$usr坐標並定義三個調整參數p* 。 為了穩定起見，我強烈建議使用png設備或具有固定寬度和高度的類似設備。

png('foo.png', width=480, height=480)

plot(matrix(1:12, 3, 4), type="n", col=2)
pu <- par()$usr
p1 <- 2.1; p2 <- 1.9; p3 <- 1.4
legend(pu[3] - p1, pu[4], legend=rep('', 21), lty=rep(1, 21), title='',
       ncol=7, col=rep(NA, 21))
legend(pu[3] - p1, pu[4], legend=c(paste0('T=', 1:3), rep('', 6)), title='', bty='n', 
       adj=.3, ncol=3, col=c(rep(1, 3), rep(NA, 6)))
legend(pu[3] - p2, pu[4], legend=rep('', 3), lty=1, title='', col=c(2, 5, 3), bty='n')
legend(pu[3] - p3, pu[4], legend=rep('', 3), lty=1, title='', col=c(6, 4, 7), bty='n')
legend(pu[3] - p2, pu[4], legend='fooooooooooo', bty='n', ncol=3, adj=.12)
legend(pu[3] - p3, pu[4], legend='baaaaaaaaaar', bty='n', ncol=3, adj=.12)
box()

dev.off()