Hi Jorge and Dennis,

Thank you for the hint! 

However, I'm still very intrigued as to why it does not work using plot ... 
what is special about this specific formula that plot doesn't like it?

Best regards,
Giovanni

On May 15, 2010, at 7:12 AM, Jorge Ivan Velez wrote:
> Hi Giovanni,
> 
> curve(1/(1+exp(5.0993-0.1084*x)), 0, 100)
> 
> HTH,
> Jorge
> 
> 
> On Sat, May 15, 2010 at 12:43 AM, Giovanni Azua <> wrote:
> Hello,
> 
> I'd like to plot the logistic function for a specific model like this:
> 
> > plot(formula=y~1/(1+exp(5.0993-0.1084*x)),data=data.frame(x=seq(0,100,length.out=1000)))
> Error in is.function(x) : 'x' is missing
> 
> However, I get the 'x' is missing error above and don't know how to fix it ...
> 
> Can anyone advice?
> Thanks in advance,
> Best regards,
> Giovanni
> 
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