Displaying 2 results from an estimated 2 matches for "logconc".
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logconf
2000 Jan 06
1
nlme
Among others, datam contains the columns: logconc, tm, dose, subj, bilirubin.
None of these are factor variables.
The following compartment models work (the first still has not
converged after 100 interations):
res1 <- nlme(logconc~p2+p3+log(dose/(exp(p1)-exp(p2))*
(exp(-exp(p2)*tm)-exp(-exp(p1)*tm))),start=list(fixed=c(5,-2,-0.1)),
fixed=l...
2000 Nov 07
1
coercion of LHS to a list
...0.4353
B1 0.3954
BF 0.4355
C1 0.3975
CF 0.4345
I also have a calibration curve loaded
Voltage NaF LogNaF
1 0.3588 20 1.30103
2 0.3990 100 2.00000
3 0.4391 500 2.69897
If I try to create a new column at the R command line, as follows:
nebdata$logconc<-nebdata$Volt*nebcal.fm$coefficients[2]+nebcal.fm$coefficients[1]
I get this (as I expected):
> nebdata
Volt logconc
ABal 0.4208 2.380112
A1 0.3982 1.986653
AF 0.4353 2.632553
B1 0.3954 1.937905
BF 0.4355 2.636035
C1 0.3975 1...