(R) two lines in a graph, lines and points in a graph.

<Three ways to make a line graph>

> plot(women$height,women$weight,type="l")

> ggplot(data=women,aes(x=height,y=weight))+geom_line()

> qplot(data=women,height,weight,geom="line")

<Three ways to make a point graph on the line graph>

> plot(women$height,women$weight,type="l")

> points(women$height,women$weight)

> ggplot(data=women,aes(x=height,y=weight))+geom_line()+geom_point()

> qplot(data=women,height,weight,geom=c("line","point"))

<Two lines in a graph - Ibs to kg>

> ggplot(data=women,aes(x=height,y=weight))+geom_line()+geom_point()+geom_line(aes(x=height,y=weight/2.205),col="red")

>ggplot(data=women,aes(x=height,y=weight))+geom_line()+geom_point()+geom_line(aes(x=height,y=weight/2.205),col="red")+geom_point(aes(x=height,y=weight/2.205),col="red")