hanks to everyone who helped,
Jared
On Wed, Dec 15, 2010 at 8:47 AM, dave fournier wrote:
> Jared Blashka wrote:
>
> Hi,
>
> Can you write a little note to the R list saying something like
>
> Re: SOLVED[R] Complicated nls formula giving singular gradient
> message
&g
s.
>
> Admittedly this function is trivial, but perhaps in your case
> you could use the segments from prism to construct a function
> for the right-hand side of your nls call.
>
> Hope this helps.
> - Phil Spector
>
I'm attempting to calculate a regression in R that I normally use Prism for,
because the formula isn't pretty by any means.
Prism presents the formula (which is in the Prism equation library as
Heterologous competition with depletion, if anyone is curious) in these
segments:
KdCPM = KdnM*SpAct*Vo
ndering if
there was a way to accomplish the end goal without those measures.
Thanks,
Jared
On Wed, Oct 13, 2010 at 3:14 PM, Jared Blashka wrote:
> As an addendum to my question, I'm attempting to apply the solution to the
> robust non-linear regression function nlrob from the robus
lue. Am I correct and is there another method of
using nlrob in the same way?
Thanks,
Jared
On Tue, Oct 12, 2010 at 8:58 AM, Jared Blashka wrote:
> Thanks so much! It works great.
>
> I had thought the way to do it relied on combining the data sets, but I
> couldn't figure ou
I'm attempting to insert variables as expressions into labels for my plots,
but I'm running into the issue that characters in my labels aren't allowed
in expressions, notably '[' and ']'. An input string of "[^3H]5-CT" needs to
be displayed as [3H]5-CT with the 3 as superscript. But brackets aren't
I'm working with 3 different data sets and applying this non-linear
regression formula to each of them.
nls(Y ~ (upper)/(1+10^(X-LOGEC50)), data=std_no_outliers,
start=list(upper=max(std_no_outliers$Y),LOGEC50=-8.5))
Previously, all of the regressions were calculated in Prism, but I'd like to
be
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