Add x=y geom_abline to ggplot

[sig]

I am trying to add x=y line to my ggplot.
i keep getting this line and its not x=y line.

here is my code:
ggplot(data=compare_df, aes(x=correct_answer, y=average_guess))+
geom_point(aes(col=experiment_type))+
geom_abline()

[Yarnabrina]

Welcome to the community!

@sig

its not x=y line

Why do you think so? Is it because it doesn't seem to have slope 1?

Note that the scales of the x and y axes are different, and hence it will not maintain a 45 degree angle with the x-axis.

I don't have your data, and hence can't check for myself, but I think coord_equal will be useful.

Hope this helps.

[sig]

Thank you!
this is not x=y line because when x=39.2 y=less then 25.

i have tried using coord_equal command and its just made the screen look more narrow.

maybe you know how can I make the scales of the x and y axes to be the same?

[Matthias]

try adding the slope and the intercept directly in the call for the line:
geom_abline(slope=1, intercept = 0)
But it's strange, I just tested with iris, and there it works fine, even without any parameters.

[sig]

still doesn't work

ggplot(data=compare_df, aes(x=correct_answer, y=average_guess))+
geom_point(aes(col=experiment_type))+
geom_abline(slope=1, intercept = 0)

[Matthias]

When looking at your axis it seems x isn't numeric!
Try adding x=as.numeric(correct_answer) in the first line!?