I am getting the following error when trying to run a gam.possion model
with Zelig.
Error in eval(expr, envir, enclos) : attempt to apply non-function
Even the example won't run.
library(mgcv)
library(Zelig)
n <- 400
sig <- 2
x0 <- runif(n, 0, 1); x1 <- runif(n, 0, 1)
x2 <- runif(n, 0, 1); x3 <- runif(n, 0, 1)
f0 <- function(x) 2 * sin(pi * x)
f1 <- function(x) exp(2 * x)
f2 <- function(x) 0.2 * x^11 * (10 * (1 - x))^6 + 10 * (10 * x)^3 * (1 -
x)^10
f3 <- function(x) 0 * x
f <- f0(x0) + f1(x1) + f2(x2)
g <- exp(f/4)
y <- rpois(rep(1, n), g)
my.data <- as.data.frame(cbind(y, x0, x1, x2, x3))
z.out <- zelig(y ~ s(x0) + s(x1) + s(x2) + s(x3), model = "gam.poisson",
data = my.data)
What am I doing wrong? Session info is below. Thanks a lot!
Sincerely,
Milu
####
sessionInfo()
R version 3.3.2 (2016-10-31)
Platform: x86_64-w64-mingw32/x64 (64-bit)
Running under: Windows 7 x64 (build 7601) Service Pack 1
locale:
[1] LC_COLLATE=English_United States.1252 LC_CTYPE=English_United
States.1252 LC_MONETARY=English_United States.1252
[4] LC_NUMERIC=C LC_TIME=English_United
States.1252
attached base packages:
[1] stats graphics grDevices utils datasets methods base
other attached packages:
[1] Zelig_5.0-13 mgcv_1.8-15 nlme_3.1-128
loaded via a namespace (and not attached):
[1] Rcpp_0.12.8 nloptr_1.0.4 plyr_1.8.4
miscTools_0.6-22 tools_3.3.2 lme4_1.1-12
[7] MatchIt_2.4-21 jsonlite_1.1 tibble_1.2
lattice_0.20-34 Matrix_1.2-7.1 DBI_0.5-1
[13] maxLik_1.3-4 parallel_3.3.2 SparseM_1.74 coda_0.18-1
AER_1.2-4 dplyr_0.5.0
[19] MatrixModels_0.4-1 nnet_7.3-12 stats4_3.3.2 lmtest_0.9-34
grid_3.3.2 R6_2.2.0
[25] geepack_1.2-1 survival_2.40-1 VGAM_1.0-2
foreign_0.8-67 minqa_1.2.4 Amelia_1.7.4
[31] Formula_1.2-1 car_2.1-3 magrittr_1.5 mcmc_0.9-4
MASS_7.3-45 splines_3.3.2
[37] pbkrtest_0.4-6 assertthat_0.1 quantreg_5.29
sandwich_2.3-4 survey_3.31-5 MCMCpack_1.3-8
[43] lazyeval_0.2.0 zoo_1.7-13
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