1 files changed, 6 insertions, 3 deletions

diff --git a/R/poly.R b/R/poly.R
index a4e777b..5655a2f 100644
--- a/R/poly.R
+++ b/R/poly.R
@@ -172,9 +172,12 @@ predict.idpoly <- function(x,data,nahead=1){
   G <- signal::Arma(b=c(rep(0,x$ioDelay),x$B),
                     a= as.numeric(polynom::polynomial(x$A)*
                                     polynom::polynomial(x$F1)))
-  
-  Hden <- as.numeric(polynom::polynomial(x$A)*polynom::polynomial(x$D))
-  Hinv <- signal::Arma(b=Hden,a=x$C)
+  if(x$type=="oe" || nahead==Inf){
+    ypred <- signal::filter(G,u)
+  } else{
+    Hden <- as.numeric(polynom::polynomial(x$A)*polynom::polynomial(x$D))
+    Hinv <- signal::Arma(b=Hden,a=x$C) 
+  }
   
   return(ypred)
 }
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