From 1f27c46baf19f9811d9ea5be7f9d9178f4d04fce Mon Sep 17 00:00:00 2001
From: Suraj Yerramilli
Date: Sat, 7 Feb 2015 02:56:15 +0530
Subject: added imputing function to deal with missing values

---
 R/preProcess.R    | 23 ++++++++++++++++++++---
 man/dataImpute.Rd |  2 +-
 2 files changed, 21 insertions(+), 4 deletions(-)

diff --git a/R/preProcess.R b/R/preProcess.R
index 0adb56c..a9db126 100644
--- a/R/preProcess.R
+++ b/R/preProcess.R
@@ -24,13 +24,30 @@
 #' 
 #' @seealso \code{\link[Amelia]{amelia}}
 #' @export 
-dataImpute <- function(data,m=5){
+dataImpute <- function(data,m=1){
   # check if the class is correct
   if(class(data)!='idframe')
     stop("Not an idframe data")
   
-  ninputs <- dim(data$input)[2]
   dataMatrix <- cbind(data$input,data$output)
   
-  a.out <- amelia(dataMatrix,m=5,p2s = 0)
+  a.out <- amelia(dataMatrix,m=m,p2s = 0)
+  
+  a.assign <- function(dataMatrix,data){
+    ninputs <- dim(data$input)[2]
+    out <- data
+    
+    colIndex <- 1:(dim(dataMatrix)[2])
+    inputIndex <- 1:ninputs
+    outputIndex <- colIndex[!(colIndex %in% inputIndex)]
+    
+    out$input <- dataMatrix[,1:inputIndex,drop=F]
+    out$output <- dataMatrix[,1:outputIndex,drop=F]
+    
+    return(out)
+  }
+  
+  imputations <- lapply(X=a.out$imputations,FUN=a.assign,data=data)
+  
+  return(list(imputations=imputations,m=m))
 }
\ No newline at end of file
diff --git a/man/dataImpute.Rd b/man/dataImpute.Rd
index 9139862..67c83e0 100644
--- a/man/dataImpute.Rd
+++ b/man/dataImpute.Rd
@@ -4,7 +4,7 @@
 \alias{dataImpute}
 \title{Impute missing values}
 \usage{
-dataImpute(data, m = 5)
+dataImpute(data, m = 1)
 }
 \arguments{
 \item{data}{an object of class \code{idframe}}
-- 
cgit