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1、Usingggplot2HadleyWickham是RStudio的首席科学家以及RiceUniversity统计系的助理教授。他是著名图形可视化软件包ggplot2的开发者，以及其他许多被广泛使用的软件包的作者，代表作品如plyr、reshape2等Layout概念例子Layout数据和映射ggplot(data,aes(x=,y=,fill=))数据集映射Layout几何对象：散点图，气泡图，条形图，折线图，箱形图统计变换：封箱（bin），identity位置调整：dodge,fill,identity坐标系统:xlim,ylim图层分面:facet_grid例子1散点图起手
2、势ggplot(mtcars,aes(x=wt,y=mpg))+geom_point()Mtcars数据格式2shape参数修改图形的形状ggplot(mtcars,aes(x=wt,y=mpg))+geom_point(shape=21)3size参数修改图形的大小ggplot(mtcars,aes(x=wt,y=mpg))+geom_point(size=1.5)ggplot(mtcars,aes(x=wt,y=mpg))+geom_point(size=5)4多因素作图heightweight[,c("sex","ageYear","heightIn")]ggplot(he
3、ightweight,aes(x=ageYear,y=heightIn,colour=sex))+geom_point()ggplot(heightweight,aes(x=ageYear,y=heightIn,shape=sex,color=sex))+geom_point()5scale_shape_manual设置想要shapeggplot(heightweight,aes(x=ageYear,y=heightIn,shape=sex,colour=sex))+geom_point()+scale_shape_manual(values=c(1,2))+scale_colo
4、ur_brewer(palette="Set1")ggplot(heightweight,aes(x=ageYear,y=heightIn,colour=weightLb))+geom_point()ggplot(heightweight,aes(x=ageYear,y=heightIn,size=weightLb))+geom_point()6scale_fill_gradient设置legend的颜色ggplot(heightweight,aes(x=weightLb,y=heightIn,fill=ageYear))+geom_point(shape=21,size=2.5
5、)+scale_fill_gradient(low="black",high="red")7scale_fill_gradient设置break的大小ggplot(heightweight,aes(x=weightLb,y=heightIn,fill=ageYear))+geom_point(shape=21,size=2.5)+scale_fill_gradient(low="black",high="red",breaks=12:17,guide=guide_legend())8scale_size_area()使图形比例恰当ggplot(heightweight,aes(x
6、=ageYear,y=heightIn,size=weightLb,colour=sex))+geom_point(alpha=.5)+scale_size_area()+scale_colour_brewer(palette="Set1")9Alpha参数修改透明度sp<-ggplot(diamonds,aes(x=carat,y=price))sp+geom_point()sp+geom_point(alpha=.1)sp+geom_point(alpha=.01)10使用bin方法显示高密度散点图sp+stat_bin2d()10Bin设置区分度，scale_fill_gr
7、adientlimit设置上标下标sp+stat_bin2d(bins=50)+scale_fill_gradient(low="lightblue",high="red",limits=c(0,6000))11scale_fill_gradient设置legend的坐标sp+stat_bin2d()+scale_fill_gradient(low="lightblue",high="red",breaks=c(0,250,500,1000,2000,4000,6000),lim
