轴标签与轴线重叠值

Question

我在正确地绘制下图的标签的问题：

scatterhist = function(x, y, xlab="", ylab=""){ 
    zones=matrix(c(2,0,1,3), ncol=2, byrow=TRUE) 
    layout(zones, widths=c(4/5,1/5), heights=c(1/5,4/5)) 
    xhist = hist(x, plot=F, breaks=10) 
    yhist = hist(y, plot=F, breaks=10) 
    top = max(c(xhist$counts, yhist$counts)) 

    par(mar=c(3,3,1,1)) 
    plot(x, y) 

    par(mar=c(0,3,1,1)) 
    barplot(xhist$counts, axes=FALSE, ylim=c(0, top), space=0) 

    par(mar=c(3,0,1,1)) 
    barplot(yhist$counts, axes=FALSE, xlim=c(0, top), space=0, horiz=TRUE) 

    par(oma=c(3,3,0,0)) 
    mtext(xlab, side=1, line=1, outer=TRUE, adj=0, 
    at=.8 * (mean(x)-min(x))/(max(x)-min(x))) 
    mtext(ylab, side=2, line=1, outer=TRUE, adj=0, 
    at=.8 * (mean(y)-min(y))/(max(y)-min(y))) 
} 

当I型：

scatterhist(x[,6], x[,7], xlab="Cost of Taxi", ylab="Cost of Fuel") 

标签与所述轴的值重叠。但是，如果我输入：

scatterhist(x[,6], x[,7], xlab="Cost of Taxi", ylab="Cost of Fuel") 
scatterhist(x[,6], x[,7], xlab="Cost of Taxi", ylab="Cost of Fuel") 

第二个图形显示正确......任何人都可以帮我解决这个问题吗？我也试图通过windows()打开图形窗口之前的第一个阴谋，但这是行不通的...

谢谢！ Stefano

Answer 1

您的par(oma=c(3,3,0,0))行应该在第一个par(mar=...)调用之前出现，因为它应该应用于整个设备区域（即，如果已经绘制了某些图，则不能更改外边距的大小）。

scatterhist = function(x, y, xlab="", ylab=""){ 
    zones=matrix(c(2,0,1,3), ncol=2, byrow=TRUE) 
    layout(zones, widths=c(4/5,1/5), heights=c(1/5,4/5)) 
    par(oma=c(3,3,0,0)) 

    xhist = hist(x, plot=F, breaks=10) 
    yhist = hist(y, plot=F, breaks=10) 
    top = max(c(xhist$counts, yhist$counts)) 

    par(mar=c(3,3,1,1)) 
    plot(x, y) 

    par(mar=c(0,3,1,1)) 
    barplot(xhist$counts, axes=FALSE, ylim=c(0, top), space=0) 

    par(mar=c(3,0,1,1)) 
    barplot(yhist$counts, axes=FALSE, xlim=c(0, top), space=0, horiz=TRUE) 

    mtext(xlab, side=1, line=1, outer=TRUE, adj=0, 
     at=.8 * (mean(x)-min(x))/(max(x)-min(x))) 
    mtext(ylab, side=2, line=1, outer=TRUE, adj=0, 
     at=.8 * (mean(y)-min(y))/(max(y)-min(y))) 
    }