new file mode 100755
--- /dev/null
+++ b/splitRDI
@@ -0,0 +1,64 @@
+#!/usr/bin/perl
+#======================================================================
+# S P L I T R D I
+# doc: Sat Aug 21 22:20:27 2010
+# dlm: Sat Aug 21 23:18:41 2010
+# (c) 2010 A.M. Thurnherr
+# uE-Info: 51 44 NIL 0 0 72 2 2 4 NIL ofnI
+#======================================================================
+
+# split RDI files based on list of ensemble numbers (e.g. from yoyo -t)
+
+# HISTORY:
+# Aug 21, 2010: - created
+
+# NOTES:
+# - it is assumed that the input file begins with ensemble #1
+# - input file extension 000 is assumed
+# - turning-point ensembles are written to preceding profile,
+# for compatibility with [yoyo]
+
+$0 =~ m{(.*/)[^/]+};
+require "$1RDI_BB_Read.pl";
+use Getopt::Std;
+
+die("Usage: $0 " .
+ "[out-file -b)asename <bn>] " .
+ "[out-file -n) <digits>] " .
+ "<RDI file> <ens> <ens[...]>\n")
+ unless (&getopts('b:n:') && @ARGV>=3);
+
+chomp($opt_b = `basename $ARGV[0] .000`) # basename
+ unless defined($opt_b);
+$opt_n = 2 # number of digits in profile #
+ unless defined($opt_n);
+
+readHeader($ARGV[0],\%hdr); shift; # get length of ensembles
+$ens_len = $hdr{ENSEMBLE_BYTES} + 2;
+
+$first_ens = $ARGV[0]+1; shift; # initialize loop
+$last_ens = $ARGV[0]; shift;
+$cnr = 0;
+
+do { # split data
+ sysseek(WBRF,($first_ens-2)*$ens_len,0) ||
+ die("$WBRcfn: $!");
+ $last_ens++ unless defined($ARGV[0]);
+ $nBytes = ($last_ens-$first_ens+1) * $ens_len;
+ sysread(WBRF,$buf,$nBytes) == $nBytes ||
+ die("$WBRcfn: file truncated");
+
+ $fn = $opt_b . sprintf("_%0${opt_n}d.000",$cnr++);
+ open(F,">$fn") || die("$fn: $!\n");
+ syswrite(F,$buf,$nBytes) == $nBytes ||
+ die("$fn: $!\n");
+ close(F);
+ printf(STDERR "$fn: %d ensembles ($nBytes bytes)\n",$last_ens-$first_ens+1);
+
+ $first_ens = $last_ens+1;
+ $last_ens = $ARGV[0]; shift;
+} while defined($last_ens);
+
+exit(0);
+
+