Gabor Grothendieck <[EMAIL PROTECTED]> writes:
> Perhaps you really prefer something with a continuous first derivative?
> In that case, all the continuous cumulative distribution functions have
> a sigmoidal shape and might be suitable. You could fit pnorm, plogis or tanh
> with suitable scalin
Perhaps you really prefer something with a continuous first derivative?
In that case, all the continuous cumulative distribution functions have
a sigmoidal shape and might be suitable. You could fit pnorm, plogis or tanh
with suitable scaling and location parameters using nls. An example
of fit
TAPO (Thomas Agersten Poulsen) wrote:
> Dear R-list,
>
> It is not uncommon for laboratory equipment (e.g.
spectrophotometers) to have a linear response in a certain interval and
then go into saturation. I wonder if there is an R-function that models
this; for instance by estimating the break
Dear R-list,
It is not uncommon for laboratory equipment (e.g. spectrophotometers) to have
a linear response in a certain interval and then go into saturation. I wonder if there
is an R-function that models this; for instance by estimating the breakpoint and
fitting a line below the bre
