Add mustbe member selection

+PlotID/TagPlot.m

@@ -16,7 +16,8 @@ arguments
     options.ProjectID (1,:) {mustBeText}= ''
     options.Fontsize (1,1) {mustBeInteger} = 8
     options.Color (1,3)  {mustBeNonnegative} = 0.65*[1 1 1] % grey
-    options.Location (1,:) {mustBeText} = 'east'
+    options.Location (1,:) {mustBeMember(options.Location,{'north','east',...
+        'southeast','south','west','custom'})} = 'east'
     options.DistanceToAxis {mustBeReal} = .01 % relative distance
     options.Position (1,2) {mustBeVector} = [1,0.4] % default for east
     options.Rotation (1,1) {mustBeReal} = NaN