# assign value of header for column to be removed
REMOVE='dxv1'
# assign data input file for $FOLD
BASE_INPUT_FILE_LIST=($(ls './'$SET'/input_data/base/'$FOLD'_'*'_'$SET'_'*'.txt'))
# assign modified input file directory
MOD_INPUT_FILE_DIR=$(ls -d './'$SET'/input_data/')
echo $MOD_INPUT_FILE_DIR

for BASE_INPUT_FILE in "${BASE_INPUT_FILE_LIST[@]}"
do
   echo $BASE_INPUT_FILE
   # change path to filename
   REVISED_FILE=$(echo $BASE_INPUT_FILE | awk 'BEGIN {FS="/"} {print $5}')
   REVISED_FILE='./'$SET'/input_data/'$REVISED_FILE
   echo $REVISED_FILE

   # find the location of the column to be removed
   HEADER_ROW_LIST=($(cat $BASE_INPUT_FILE | sed -n '3p'))
   ELEMENT_COUNTER='0';  HEADER_POSITION='0'

   # loop through headers
   for HEADER_ROW in "${HEADER_ROW_LIST[@]}"
   do
      # incrementer counter
      (( ELEMENT_COUNTER++ ))
      echo $HEADER_ROW
      if [ "$HEADER_ROW" == "$REMOVE" ]; then
         echo "found remove at position" $ELEMENT_COUNTER
         HEADER_POSITION=$ELEMENT_COUNTER
      fi
   done
   echo $REMOVE "was found at position" $HEADER_POSITION

   # create values before and after position to be removed
   let "REMOVE_m1=$HEADER_POSITION-1";  let "REMOVE_p1=$HEADER_POSITION+1";

   echo "REMOVE_m1" $REMOVE_m1
   echo "REMOVE_p1" $REMOVE_p1

   # remove column from file
   cut --output-delimiter=$'\t' -f1-$REMOVE_m1,$REMOVE_p1-  $BASE_INPUT_FILE > $REVISED_FILE