请问在r语言中par(‘usr’)[2]什么意思？

Question

r语言中par(‘usr’)[2]什么意思

Answer 1

设置图位置参数的。
A vector of the form c(x1, x2, y1, y2)
giving the extremes of the user coordinates of the plotting
region. When a logarithmic scale is in use (i.e.,
par("xlog") is true, see below), then the x-limits will be
10 ^ par("usr")[1:2]. Similarly for the y-axis.

Answer 2

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#例子：attach(mtcars)opar <- par(no.readonly=TRUE)par(mfrow=c(3,2)) # 按行填充，3行2列，一共六个。hist(wt)hist(mpg)hist(disp)hist(wt)hist(mpg)hist(disp)par(opar)detach(mtcars) ##for more please use  help(par)     see  examples

图片如下：