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+function net = convertoldnet(net)
+%CONVERTOLDNET Convert pre-2.3 release MLP and MDN nets to new format
+%
+%	Description
+%	NET = CONVERTOLDNET(NET) takes a network NET and, if appropriate,
+%	converts it from pre-2.3 to the current format.  The difference is
+%	simply  that in MLPs and the MLP sub-net of MDNs the field ACTFN has
+%	been  renamed OUTFN to make it consistent with GLM and RBF networks.
+%	If the network is not old-format or an MLP or MDN it is left
+%	unchanged.
+%
+%	See also
+%	MLP, MDN
+%
+
+%	Copyright (c) Ian T Nabney (1996-2001)
+
+switch net.type
+    case 'mlp'
+	if (isfield(net, 'actfn'))
+	    net.outfn = net.actfn;
+	    net = rmfield(net, 'actfn');
+	end
+    case 'mdn'
+	net.mlp = convertoldnet(net.mlp);
+end