qq_24573381的博客

一、自定义绘图#1初级绘图oldpar=par(pin=c(5,2),mai=c(0.6,0.6,0.6,0.1))#设置图的尺寸宽5高2和边界，单位：英寸plot(1:10,1:10,type='n',main='主标题',sub='副标题',xlab='',ylab='', xlim=c(0,15),ylim=c(0,10),frame.plot=TRUE,axes=FALSE, mgp=c(2.3,1,0),cex.main=1,cex.sub=0.8)#plot(x

1.绘制二维正态分布（X,Y)~N(0,0,1,1,0)y=x=seq(-3,3,by=0.05)fdesity=function(x,y) {1/(2*pi)*exp(-(x^2+y^2)/2)}z=outer(x,y,fdesity)z=outer(x,y,fdesity)persp(x,y,z,theta = 45,expand=0.6)2.计算

一、基本操作与控制1.1通过以下方式获取帮助 help(函数名)help(mean) ??关键词??mean apropos('关键词')apropos('mean') [1] ".colMeans" ".rowMeans" "colMeans" "kmeans" "mean" [6] "mean.Date" "mean.default" "mean.difftime" ".