Switch problem
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Hello, I'm currently learning MATLAB, and the code from one question of the week 5 lab doesn't work. It returns me the error "??? SWITCH expression must be a scalar or string constant."
The code is below:
names = [{'Sam','Jim','Tom','Joe','Kai','Zoe','Jan','Pam','Bob','Ann'}];
Names = sort(names);
MarkUpdater = menu('please select a name from the menu: ',Names)
for i=1: length(Names)
switch Names
case 1
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markAnn = mark-1;
case 2
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markBob = mark-1;
case 3
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markJan = mark-1;
case 4
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markJim = mark-1;
case 5
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markJoe = mark-1;
case 6
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markKai = mark-1;
case 7
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markPam = mark-1;
case 8
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markSam = mark-1;
case 9
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markTom = mark-1;
case 10
mark=menu('please select the mark: ', ...
'0','1','2','3','4','5','6','7','8','9','10')
markZoe = mark-1;
end
end
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采纳的回答
Walter Roberson
2011-7-30
Instead of switching on Names, you need to switch on MarkUpdater since that is your numeric value.
(There are, of course, much better ways to write that code, but presumably the lab will lead you through them.)
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