[R] argument "x" is missing in minpack.lm

[Sarah Goslee]

You create objects A, B, and K, but then use A, B, and X in the call to
nls.lm().

I have no idea if nls.lm is the right tool for your job, but I do know that
you need to use the same names.

Sarah

On Tue, Jun 30, 2020 at 6:01 AM Luigi Marongiu <marongiu.luigi using gmail.com>
wrote:

> Hello,
> I am trying to optimize a function with the function nls.lm from the
> package minpack.lm. But I can't get it right:
> ```
> A = 3261
> B = 10
> K = c(8,   24,   39,   63,   89,  115,  153,  196,  242,  287,  344,
> 408,  473,
>       546,  619,  705,  794,  891,  999, 1096, 1242, 1363, 1506, 1648,
> 1753,
>       1851, 1987, 2101, 2219, 2328, 2425, 2575, 2646, 2698, 2727, 2771,
> 2818,
>       2853, 2895, 2926, 2964, 2995, 3025, 3053, 3080, 3102, 3119, 3141,
> 3152,
>       3159, 3172, 3182, 3196, 3209, 3220, 3231, 3239, 3246, 3252, 3261)
> O = nls.lm(list(a=A, b=B, x=X), holling,
>            lower=NULL, upper=NULL, jac = NULL)
> > Error in fn(par, ...) : argument "x" is missing, with no default
> ```
> What am I missing?
> Is nls.lm the right function for functions that are not linear?
> Thank you
> --
> Best regards,
> Luigi
>
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-- 
Sarah Goslee (she/her)
http://www.sarahgoslee.com

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