> demo(plotmath) demo(plotmath) ---- ~~~~~~~~ Type to start : > # Copyright...draw.plotmath.cell(expression(x * y), i, nr); i <- i + 1 > draw.plotmath.cell(expression(x / y), i,...nr); i <- i + 1 > draw.plotmath.cell(expression(x %+-% y), i, nr); i <- i + 1 > draw.plotmath.cell...1 > draw.plotmath.cell(expression(x %.% y), i, nr); i <- i + 1 > draw.plotmath.cell(expression(-x),...> draw.plotmath.cell(expression(x >= y), i, nr); i <- i + 1 > draw.plotmath.cell(expression(x %~~% y
plotmath查看数学表达式;parse设为TRUE annotate('text', x = 2017, y = 50, label = 'f(x) == frac(x+y,sqrt(2*pi,3)
(locator(1),"text to place",cex=,col=) mtext("y=1/x",side=4,line=3,cex.lab=1,las=2,col="blue") help(plotmath
expression(italic(n)))+ # expression doc: https://stat.ethz.ch/R-manual/R-devel/library/grDevices/html/plotmath.html...Rbook/html/_Rbook/ggplotvis.html [4] 教程: https://stat.ethz.ch/R-manual/R-devel/library/grDevices/html/plotmath.html
pattern的命令 R.Version() 查看系统情况和版本 compareVersion() source() 执行R脚本 demo() 运行R的演示脚本,如demo(plotmath
expression(paste(bgroup("(", atop(n, x), ")"),p^x, q^{n-x}))) 更多的信息,包括其特性的一个完整列表可以在R中通过下面的命令得到: > help(plotmath...) > example(plotmath) 添加Hershey矢量字体 > help(Hershey) > example(Hershey) 12.3 图形的交互 R提供了函数,使用户可以通过鼠标从图形中释放信息或添加信息
.: (3x10^+2 -> 3x10^2) l <- gsub("e\\+","e",l) # turn the 'e+' into plotmath format l <- gsub
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