CODEWITHSUNDEEP
rstatistics
fire_ecologist
fire_ecologist

Reputation: 263

System is computationally singular error in R

I'm doing Zero-Inflated Model to my data. I'm using RStudio and pscl package. My models:

z_deniz <- zeroinfl(YANs ~ deniz, dist = "poisson", link = "logit", data=zipveri3)
zn3_nufus05 <- zeroinfl(YANs ~ nufus05, dist = "negbin", link = "logit", data=zipveri3)

I don't have problems with my other models but I get this error with these two models:

Error in solve.default(as.matrix(fit$hessian)) : system is computationally singular: reciprocal condition number = 9.93413e-121

Dependent variable is fire counts and independent variables are distance to coastline and population. I tried to log transform my dependent variable but it didn't work. 

summary(regveri3$deniz)
     Min.   1st Qu.    Median      Mean   3rd Qu.      Max. 
     4.24  18010.00  48070.00  65760.00  97340.00 269200.00

Any help is appreciated!

Upvotes: 1

Views: 5529

Answers (1)

rebecca592
rebecca592

Reputation: 11

Try specifying the regressors for the zero component. If you want to use none, then add "1"; otherwise replace "1" with the variables you want to use:

z_deniz <- zeroinfl(YANs ~ deniz | 1, dist = "poisson", link = "logit", data=zipveri3)

Source can be found here .

Upvotes: 1

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