[R] Uniroot - error

Hi, I have tried to use uniroot to solve a value (value a in my function) that gives f=0, and I repeat this process for 1 times(stimulations). However error occures from the 4625th stimulation - Error in uniroot(f, c(0, 2), maxiter = 1000, tol = 0.001) : f() values at end points not of

Re: [R] Uniroot - error

sorry I am not asking someone to do my homework, as I have finished all the procedure. I am just wondering why this technical error occurs, so I can fix it myself. By the way i don't have any instructor or teaching assistant for help, so any suggestion for the error will be appreciated. Thanks