Displaying 6 results from an estimated 6 matches for "trysol2".
2023 Aug 20
3
Issues when trying to fit a nonlinear regression model
...es = c(NA, -15L), class = "data.frame")
I did the following to try to fit a nonlinear regression model:
#First, Procedure to Find Starting (initial) Values For Theta1, Theta2, and
Theta3
mymod2 <- y ~ theta1 - theta2*exp(-theta3*x)
strt2 <- c(theta1 = 1, theta2 = 2, theta3 = 3)
trysol2<-nlxb(formula=mymod2, data=mod14data2_random, start=strt2,
trace=TRUE)
trysol2
trysol2$coefficients[[3]]
#Fitting nonlinear Regression Model Using Starting Values From Previous Part
nonlinearmod2 <- nls(mymod2, start = list(theta1 =
trysol2$coefficients[[1]],
theta2 = tr...
2023 Aug 20
1
Issues when trying to fit a nonlinear regression model
...>
> I did the following to try to fit a nonlinear regression model:
>
> #First, Procedure to Find Starting (initial) Values For Theta1, Theta2, and
> Theta3
>
> mymod2 <- y ~ theta1 - theta2*exp(-theta3*x)
>
> strt2 <- c(theta1 = 1, theta2 = 2, theta3 = 3)
>
> trysol2<-nlxb(formula=mymod2, data=mod14data2_random, start=strt2,
> trace=TRUE)
> trysol2
> trysol2$coefficients[[3]]
>
> #Fitting nonlinear Regression Model Using Starting Values From Previous
> Part
> nonlinearmod2 <- nls(mymod2, start = list(theta1 =
> trysol2$coefficients...
2023 Aug 20
2
Issues when trying to fit a nonlinear regression model
...nonlinear regression model:
>>
>> #First, Procedure to Find Starting (initial) Values For Theta1, Theta2,
>> and
>> Theta3
>>
>> mymod2 <- y ~ theta1 - theta2*exp(-theta3*x)
>>
>> strt2 <- c(theta1 = 1, theta2 = 2, theta3 = 3)
>>
>> trysol2<-nlxb(formula=mymod2, data=mod14data2_random, start=strt2,
>> trace=TRUE)
>> trysol2
>> trysol2$coefficients[[3]]
>>
>> #Fitting nonlinear Regression Model Using Starting Values From Previous
>> Part
>> nonlinearmod2 <- nls(mymod2, start = list(theta1...
2023 Aug 20
1
Issues when trying to fit a nonlinear regression model
...;
>>> #First, Procedure to Find Starting (initial) Values For Theta1, Theta2,
>>> and
>>> Theta3
>>>
>>> mymod2 <- y ~ theta1 - theta2*exp(-theta3*x)
>>>
>>> strt2 <- c(theta1 = 1, theta2 = 2, theta3 = 3)
>>>
>>> trysol2<-nlxb(formula=mymod2, data=mod14data2_random, start=strt2,
>>> trace=TRUE)
>>> trysol2
>>> trysol2$coefficients[[3]]
>>>
>>> #Fitting nonlinear Regression Model Using Starting Values From Previous
>>> Part
>>> nonlinearmod2 <- nls...
2023 Aug 20
1
Issues when trying to fit a nonlinear regression model
...to Find Starting (initial) Values For Theta1, Theta2,
>>>> and
>>>> Theta3
>>>>
>>>> mymod2 <- y ~ theta1 - theta2*exp(-theta3*x)
>>>>
>>>> strt2 <- c(theta1 = 1, theta2 = 2, theta3 = 3)
>>>>
>>>> trysol2<-nlxb(formula=mymod2, data=mod14data2_random, start=strt2,
>>>> trace=TRUE)
>>>> trysol2
>>>> trysol2$coefficients[[3]]
>>>>
>>>> #Fitting nonlinear Regression Model Using Starting Values From Previous
>>>> Part
>>>...
2023 Aug 20
1
Issues when trying to fit a nonlinear regression model
...es For Theta1,
>>>>> Theta2, and
>>>>> Theta3
>>>>>
>>>>> mymod2 <- y ~ theta1 - theta2*exp(-theta3*x)
>>>>>
>>>>> strt2 <- c(theta1 = 1, theta2 = 2, theta3 = 3)
>>>>>
>>>>> trysol2<-nlxb(formula=mymod2, data=mod14data2_random, start=strt2,
>>>>> trace=TRUE)
>>>>> trysol2
>>>>> trysol2$coefficients[[3]]
>>>>>
>>>>> #Fitting nonlinear Regression Model Using Starting Values From
>>>>> Pr...