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I’m using the plottol function in the tolerance package of R and getting an error / warning after my plot is generated that say “NOTE: A regression through the origin is fitted!”
I’ve googled it and come up with nothing and I don’t know where to start with trying to figure out what it’s warning me about.
It in general indicates that a model is fitted whereby the intercept term is forced to be zero (in other words the model has no intercept). The intercept in a model of
y ~ xis the expectation ofywhenxis equal to 0. By setting the intercept to 0 we are explicitly stating that the expectation ofyis 0 whenxis 0. In other words, the straight line fitted toy ~ xpasses through the point (0,0), i.e. the origin.If you want a less general explanation (more tailored to your specific example) you’ll need to provide more details on which of the many functions in tolerance you are using, e.g. via a reproducible example.