On 13-04-26 10:14 AM, Ben Bolker wrote:
Keith Jewell campden.co.uk> writes:
Others have pointed out that the error is probably from an unclean
environment.
Completely OT, but "an unclean environment" sounds sort of scary to me.
Like it contains zombies or something.
Isn't that accurate
Keith Jewell campden.co.uk> writes:
> Others have pointed out that the error is probably from an unclean
> environment.
>
Completely OT, but "an unclean environment" sounds sort of scary to me.
Like it contains zombies or something.
I don't know a better, short way to express the idea though
On 26/04/2013 00:16, Steven LeBlanc wrote:
> Greets,
>
> I'm trying to learn to use nls and was running the example code for
an exponential model:
>
>
>
> Perhaps also, a pointer to a comprehensive and correct document that
details model formulae syntax if someone has one?
>
> Thanks& Best
Hi
Try
x <- -(1:100)/10
set.seed(1)
y <- 100 + 10 * exp(x / 2) + rnorm(x)/10
short cut to starting values
lm(log(y) ~-log(x+10))
Call:
lm(formula = log(y) ~ -log(x + 10))
Coefficients:
(Intercept)
4.624
nlmod <- nls(y ~ A + B * exp(C * x), start=list(A=90, B=5,C=0.1))
Formula: y ~ A +
On Thu, Apr 25, 2013 at 7:16 PM, Steven LeBlanc wrote:
> Greets,
>
> I'm trying to learn to use nls and was running the example code for an
> exponential model:
>
>> x <- -(1:100)/10
>> y <- 100 + 10 * exp(x / 2) + rnorm(x)/10
>> nlmod <- nls(y ~ Const + A * exp(B * x))
> Error in B * x : non-nu
Greets,
I'm trying to learn to use nls and was running the example code for an
exponential model:
> x <- -(1:100)/10
> y <- 100 + 10 * exp(x / 2) + rnorm(x)/10
> nlmod <- nls(y ~ Const + A * exp(B * x))
Error in B * x : non-numeric argument to binary operator
In addition: Warning message:
In nl
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