Nx=`grep "MTTNx " <$1_def.r | awk '{print $3}' | sed 's/;//'`

#Write some file headers
lang_header $1 switch m mttx '[mttxs]' > $1_switch.m

# This is the main transformation using gawk
awk '{
  if (NR==1){
    printf("for i=1:%s\n",Nx)
  if ($1=="#"){
    printf("for i=1:%s\n", Nx)
    printf("  mttxs(i) = mttx(i);\n")
    printf("end;\n\n")
  }
  else{
  printf("if (%s==0.0)\n  mttxs(%s)=0.0;\nend;\n\n", $1,$2)
  printf("if (%s<0.0)\n  if (mttx(%s)<0.0)\n    mttxs(%s)=0.0;\n  end;\nend;\n", $1,$2,$2)
  }
}' Nx=$Nx < $1_switch.txt >> $1_switch.m