how to find from which residual of model a specified value belongs in R

Question

I have created a model and I need to know from which residual the value belongs.

#the value is 

3.098765

#I am using following code

which(Mod3$residuals == 3.098765) #and it throws following error
named integer(0)

Answer 1

residuals are numeric. "3.098765" means character. Try:

which(Mod3$residuals == 3.098765)