Displaying 2 results from an estimated 2 matches for "yaux".
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aux
2012 Mar 08
1
sas retain statement in R or fitting differene equations in NLS
...value of y.
yhat can be calculated as follows:
# This code illustrates how I could simulate the expected values of y if
I knew the values of the parameters tau and b.
# but in reality I would like to estimate them.
# code is for illustration of the principles and is not meant to be
functional!!
yaux[1]<-0
b<- a_number # b would have to become estimated by nls or nlme
tau<- another_number # tau would also be estimated in nls or nlme
for (t in 2:1000)
{
yaux[t+1] <- yaux[t] + (X1-yaux[t])/tau
yhat[t+1] <- yaux[t+1]*X2[t+1]/(X2[t+1]+b)
}
Now, my problem is that I do not know the v...
2012 Mar 06
0
Fitting difference models in R (nls, nlme)
...value of y.
yhat can be calculated as follows:
# This code illustrates how I could simulate the expected values of y if
I knew the values of the parameters tau and b.
# but in reality I would like to estimate them.
# code is for illustration of the principles and is not meant to be
functional!!
yaux[1]<-0
b<- a_number # b would have to become estimated by nls or nlme
tau<- another_number # tau would also be estimated in nls or nlme
for (t in 2:1000)
{
yaux[t+1] <- yaux[t] + (X1-yaux[t])/tau
yhat[t+1] <- yaux[t+1]*X2[t+1]/(X2[t+1]+b)
}
Now, my problem is that I do not know the v...