Re: [R] ggplot - adding regression lines

soon yi ymail.com> writes: > > Hi > > I am using ggplot to overlay two regression lines on a scatter plot each > corresponding to a treatment group. > > The default plot gives a different slope for each treatment group. However, > in some cases i want the lines to be parallel -ie no significan

[R] ggplot - adding regression lines

Hi I am using ggplot to overlay two regression lines on a scatter plot each corresponding to a treatment group. The default plot gives a different slope for each treatment group. However, in some cases i want the lines to be parallel -ie no significant interaction. My code: ggplot(data=df,X,Y,