Hello,
In R I am trying to use Kalman filtering to find a solution for an hydrological
problem. With Kalman Filtering I want to estimate the discharge comming from three
storage bassins. I have programmed a function in R which can run KalmanSmooth. When
I'm asking for the function and putting in values, R detects the following error:
"Error in as.vector(data) : Argument "S1" is missing, with no default".
I have try to find a solution for this error in the R help file, and in different
manuals, but I can't find it. Please help me find a solution.
Question: What does R mean with "S1" and what am I doing wrong?
Here is the way I have programmed the hydrological problem in R.
> discharge=read.table(file="C:/Program Files/R/rw1090/discharge.txt",header=T)
> deb=discharge[,1]
> deb
[1] 11.545313 8.045465 5.670868 4.044584 2.919311 2.306668 2.940956
[8] 4.238159 5.017374 3.818236 2.928805 2.262183 1.757765 1.633945
[15] 2.295130 3.454054 4.035224 3.193967 2.533181 2.012406 1.600836
[22] 1.652155 2.428678 3.642827 4.019545 3.209473 2.563617 2.048347
[29] 1.637041 1.828952 2.757842 4.050821 4.147013 3.316503 2.652490
[36] 2.121535 1.696934 2.027763 3.107366 4.429670 4.160178 3.327950
[43] 2.662237 2.129710 1.703717 2.158095 3.337039 4.582359 3.905901
[50] 3.124690 2.499732 1.999772 1.599810 2.130893 3.302622 4.336081
[57] 3.468857 2.775081 2.220062 1.776048 1.560859 2.169537 3.348081
[64] 4.170552 3.336440 2.669151 2.135320 1.708256 1.648859 2.374217
[71] 3.624091 4.248563 3.398850 2.719080 2.175264 1.740211 1.826122
[78] 2.704749 4.056438 4.437309 3.549847 2.839878 2.271902 1.817522
[85] 2.053994 3.107875 4.548436 4.600601 3.680481 2.944385 2.355508
[92] 1.884406 2.273248 3.490148 4.949898 4.584409 3.667527 2.934022
[99] 2.347217 1.877774
> Kalm = function(x,O1,O2,O3,T1,T2,T3,T4,T5,t,ga){
+ t=array(c(1+ga*O1+t/O1*(-(1/T2)-(1/T3)-(1/T1)),t/O1*(1/T2),t/O1*(1/T3),
+ t/O2*(1/T2),1+ga*O2+t/O2*(-(1/T2)-(1/T4)),t/O2*(1/T4),
+ t/O3*(1/T3),t/O3*(1/T4),1+ga*O3+t/O3*(-(1/T3)-(1/T4)-(1/T5))),dim=c(3,3));
+ h=0.5;
+ r=array(c(1,0,0,0,1,0,0,0,1),dim=c(3,3));
+ q=1;
+ v=r*q*t(r);
+ a=10.14286;
+ z=array(c((1/T1),0,0,0,0,0,0,0,(1/T5)), dim=c(3,3));
+ p=array(c(1,0,0,0,1,0,0,0,1),dim=c(3,3));
+ pn=array(c(1,0,0,0,1,0,0,0,1),dim=c(3,3));
+ kal=KalmanSmooth(x, list(T=t,Z=z,h=h,V=v,a=a,P=p,Pn=pn), nit=0)
+ kal}
> Kalm(deb,4,.5,5,.7,.1,2,3,4,1,0.65)
Error in as.vector(data) : Argument "S1" is missing, with no default
First I thought I had to make a timeserie of deb. But this doesn't change the problem.
Lot's of thanks trying to help me.
Best regards,
Pieter Hazenberg
Student Hydrology and Watermanagement
Wageningen University
The Netherlands
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