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diff --git a/src/link/MATLAB/matlab-consts.m b/src/link/MATLAB/matlab-consts.m
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+#
+# matlab-consts.m
+# matlab-link
+#
+# Created by Daniel Axtens on 28/07/10.
+# Licensed under an MIT-style license: see the LICENSE file for details.
+#
+
+# A collection of useful functions and constants for use in your agent-writing.
+# Please use the symbolic values (see the sample agents) and don't use hard-coded
+# values: if we have to change how things are represented internally, for example
+# to make things run faster, we don't want to suddenly have your agent break.
+#
+# For example, use rps.rock to get a rock, don't use 1.
+
+
+# Define some constants
+# access these with rps.<whatever>, see the sample agents for examples
+
+global rps = struct (
+	"rock",		1,
+	"paper",	2,
+	"scissors",	3,
+
+	"itemToString", {{ "Rock", "Paper", "Scissors" }}
+);
+
+# Random Item/Attack
+function item = RandomAttack()
+	global rps
+
+	switch (floor(rand(1)*3))
+	case 0
+		item = rps.rock;
+	case 1
+		item = rps.paper;
+	otherwise
+		item = rps.scissors;
+	endswitch
+endfunction
+
+
+function item = stringToItem( itemString )
+	global rps;
+
+	switch itemString
+	case "Rock"
+		item = rps.rock;
+	case "Scissors"
+		item = rps.scissors;
+	case "Paper"
+		item = rps.paper;
+	otherwise
+		# this shouldn't happen; this is passed by the supervisor, not a user
+		error( "tried to convert invalid string into Rock/Paper/Scissors!" )
+	endswitch
+
+endfunction