I am using R for graphs. I want to change the color of the line being graphed based upon a variable in the data frame. Can you help or make a suggestion please? I am including my code.Thank you.

MaryMarion

theme_minimal() + theme(legend.position = "right") ) library(ggplot2) require(scales) theme_set(

myplot1 <- ggplot(data=df,aes(x=df$Snowfall.R,y=df$Snowfall.B), shape=df$att, color=as.factor(df$att))+ geom_line()+ geom_point()+ geom_smooth(method='lm', col="grey75")+ labs(x = "Snowfall,Rochester(in)", y = "Snowfall,Buffalo(in)") + ggtitle("Buffalo vs Rochester")+ expand_limits(y=0)+ coord_fixed(ratio=1/3)+ scale_color_manual(1="blue", 2="red")+ scale_x_continuous(limits=c(0,230),breaks=c(50,100,150,200))+ scale_y_continuous(limits=c(0,230),breaks=c(50,100,150,200)) myplot1