AP_NavEKF: enable plotting in plot2.dat too

libraries/AP_NavEKF/examples/AP_NavEKF/plotit.sh

@@ -1,12 +1,21 @@
-#!/bin/sh
+#!/bin/bash
 
 cmd="plot "
 echo $#
 while [ $# -gt 1 ]; do
-    cmd="$cmd 'plot.dat' using 1:'$1',"
+    if [[ "$1" == *.* ]]; then
+        cmd="$cmd 'plot.dat' using 1:'$1',"
+    else
+        cmd="$cmd 'plot2.dat' using 1:'$1',"
+    fi
     shift
 done
-cmd="$cmd 'plot.dat' using 1:'$1'"
+if [[ "$1" == *.* ]]; then
+    cmd="$cmd 'plot.dat' using 1:'$1'"
+else
+    cmd="$cmd 'plot2.dat' using 1:'$1'"
+fi
+echo $cmd
 cat <<EOF > _plot.gnu
 set style data lines
 set xlabel "time(s)"