> Error in uniroot(integ, lower = 0, upper = 1000, n) :
> 'interval' must be a vector of length 2 >>>
> Please would you be able to give me an indication on why I am having this
> error message.
Because uniroot has a second parameter called 'interval' which overrides lower
and upper and you have given uniroot a scalar called n as the first non-named
argument. R has used its usual positional matching rules, which say that "Any
unmatched formal arguments are bound to unnamed supplied arguments, in order."
your first unmatched formal argument (interval) has been matched to your first
unnamed argument (n) so uniroot has tried to use n as your interval.
You need to add your own parameters as named parameters; eg if your function
took something called N, you would specify N=n
S Ellison
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