How do I describe a straight line equation of a glmm in an xy graph on R?

Question

Hello, I have data on age (X) and species richness per sample (y). I made a glmm and would like to know how to write the equation correctly in the figure in R. Someone has some site/paper to indicate?

Obg,

Answer 1

There are several ways to include the equation in the figure, depending on how you are filling the graph. Here are some examples, if you want a more specific answer to your problem, please enter the code you created.

Using plot:

x<- runif(1000, min = 0, max=5)
y<- pi + x^2
plot(x, y, main= expression(Gráfico ~ da ~ Equação ~ pi + x^2))

Generates the figure:

Using ggplot:

library(ggplot2)
library(ggpmisc)
dados <- data.frame(x = c(1:100))
dados$y <- pi + dados$x^2 + rnorm(100, sd = 500)
minha.formula <- y ~ x
ggplot(data = dados, aes(x = x, y = y)) +
  geom_point()+
  geom_smooth(method = "glm", se=FALSE, color="blue", formula = minha.formula) +
  stat_poly_eq(formula = minha.formula,
               eq.with.lhs = "italic(hat(y))~`=`~",
               aes(label = paste(..eq.label.., ..rr.label.., ..AIC.label.., sep =  "*plain(\",\")~")), 
               parse = TRUE) +
  labs(title= expression(Gráfico ~ da ~ Equação: ~ pi +x^2))

Generates the figure:

I hope I’ve helped :)