I wanted to force my nlme regression line through the origin so I added a (0,0) data point to my data sheet. I didn't give it a site and this is resulting in a NA group in the legend of the graph. It achieved in forcing the line through the origin but I want to get rid of that NA group but don't know how to... This is my first time using this website so lmk if I am leaving important info out. Thank you in advance!
ggplot(dfyielal,aes(x=HP1,y=AY1))+
geom_point(aes(shape = Site), size = 4, alpha = 0.5)+
stat_function(fun=fun.56YieldSite,size=1.2, color = "black")+
theme_bw(base_size = 18)+
labs(y=expression("Black Bean Yield (kg"~ha^-1*')'),
x=expression("Black Bean Density (plants"~ha^-1*')'))+
scale_y_continuous(expand = c(0, 0),labels = scales::comma,limits=c(0,3500)) +
scale_x_continuous(labels = scales::comma,
breaks=c(0,185300,370700,556000,741300,926600))+
scale_color_brewer(palette = "Accent")+
theme(plot.title = element_text(hjust = 0.5),
axis.text.x = element_text(hjust=1),
legend.position="bottom")
