*Hi R-helpers,
**I am having a problem in running msm. I have a data with 200 ID, 4
state and transition is allowed for every state.**This is the number
of transitions****> statetable.msm(Status,ID,data=dt)
to
from 1 2 3 4
1 0 54 181 100
2 11 14 7 11
3 49 12 42 10
4 75 6 3 11 ****I use the **crudeinits.msm to get initial
value for the qmatrix.
> iniq2=crudeinits.msm(Status ~ Time, ID, data=dt, qmatrix=iniq)
[,1] [,2] [,3] [,4]
[1,] -0.03037171 0.004895739 0.016409791 0.009066183
[2,] 0.05213270 -0.137440758 0.033175355 0.052132701
[3,] 0.08045977 0.019704433 -0.116584565 0.016420361
[4,] 0.12234910 0.009787928 0.004893964 -0.137030995
When I run the msm function with qmatrix=iniq2
> m1=msm( Status ~ Time, subject=ID, data = dt,qmatrix = iniq2)
*
*there is an error message
"Error in Pmat < 1e-16 : invalid comparison with complex values"
Then I change the initial value become
> iniq2
[,1] [,2] [,3] [,4]
[1,] -0.3 0.1 0.1 0.1
[2,] 0.1 -0.3 0.1 0.1
[3,] 0.1 0.1 -0.3 0.1
[4,] 0.1 0.1 0.1 -0.3
*
*Then I run again the msm
**> m1=msm( Status ~ Time, subject=ID, data = dt,qmatrix = iniq2)
there in an error massage
"Error in optim(p$inits, lik.msm, hessian = hessian, gr = gr, ...,
msmdata = msmdata, :
function cannot be evaluated at initial parameters"
*
*I have tried to use different initial value for several times, but
the same error message always appear.
**Do I need to add the data?
Does anyone have any suggestions?****Any suggestions would be much
appreciated,** **Best wishes,** **Rianti*
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