I'm using the Palmerpenguin dataset in R studio to fit a linear model. However, there are three species of penguin and my data is only showing the output for two of these. I'll try and explain better by showing my console below.
> speciesmass<- lm(penguins$body_mass_g ~ penguins$species) > speciesmass Call: lm(formula = penguins$body_mass_g ~ penguins$species) Coefficients: (Intercept) penguins$speciesChinstrap penguins$speciesGentoo 3700.66 32.43 1375.35
The output provides information on two species of penguin but not the Adelaide penguin. Any help would be greatly appreciated. Thanks!