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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 able to automate the calculation process in a script, which is why I'm trying to move to

...mal, self-contained, reproducible code. > > > > > -- Matthew S. Shotwell Graduate Student Division of Biostatistics and Epidemiology Medical University of South Carolina ------------------------------ Message: 90 Date: Wed, 13 Oct 2010 15:14:24 -0400 From: Jared Blashka <evilamarant7x at gmail.com> To: r-help at r-project.org Subject: Re: [R] Nonlinear Regression Parameter Shared Across Multiple Data Sets Message-ID: <AANLkTik0LhLW7EV4W2pmeO8zQdEyRmovbn7Lqm-zm9Oq at mail.gmail.com> Content-Type: text/plain As an addendum to my question, I'm attempting to apply th...

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 particularly liked in expressions. I know I can do

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*Vol*1000 R=NS+1 S=(1+10^(X-LogKi))*KdCPM+Hot a=-1*R b=R*S+NS*Hot+BMax c = -1*Hot*(S*MS+BMax) Y