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