Only print help on options with -[a-zA-Z]*

scripts/view14/generate_eps

@@ -23,7 +23,7 @@
 
 
 function print_the_help {
-  echo "USAGE: $0 -i <PRIM_FILE>  "
+  echo "USAGE: $0 -i <PRIM_FILE> <slices ...> "
   echo "  OPTIONS: "
   echo "            -t,--tag           filename tag (default: view1)"
   exit 
@@ -53,12 +53,16 @@ do
       shift # past argument
       shift # past value
       ;;
-    *)    # unknown option
+    -[a-zA-Z]*) # unknown option
       #POSITIONAL+=("$1") # save it in an array for later
       echo "unknown option $1"
       print_the_help
       shift # past argument
       ;;
+    *)     # positional options
+      #POSITIONAL+=("$1") # save it in an array for later
+      shift # past argument
+      ;;
   esac
 done
 set -- "${POSITIONAL[@]}" # restore positional parameters