Switch-case function problem

Hello, I am trying to get the values of the vector color to be displayed as 0 = yellow; 1 = red; 2 = green;

3 = blue; using switch-case function. I got this but it doesn't work.

color=[2,1,3,0,1,3,1,0,2]

cName ={'yellow','red','green','blue'};

for ind=1:length(color)

switch ind

case color ==0

disp(cName{'yellow'});

case color==1

disp(cName{'red'});

case color==2

disp(cName{'green'});

case color== 3

disp(cName{'blue'});

end

end

Could someone help me with this?

THANKS!

Answer 1

[Steve Eddins]

First variation: fix the switch and case lines and the indexing into cName.

    switch color(ind)    
        case 0
            disp(cName{ind+1});
        case 1
            disp(cName{ind+2});

Second variation: dispense with the switch statement altogether.

color=[2,1,3,0,1,3,1,0,2]
cName ={'yellow','red','green','blue'};
for ind=1:length(color)
    disp(cName{color(ind)+1})
end

Third variation: use a string array instead of a cell array of char vectors. This is the modern way to handle text in MATLAB.

color=[2,1,3,0,1,3,1,0,2]
cName = ["yellow", "red", "green", "blue"];
for ind=1:length(color)
    disp(cName(color(ind)+1))
end

[Skomantas Tamulaitis]

Very informative, THANK YOU!

Answer 2

[Johannes Hougaard]

If you wish to solve the problem using a switch/case sentence you should omit the == as that is assumed for the case. Furthermore the indexing to your cName variable should be numeric - not as characters.

This could be solved by

color=[2,1,3,0,1,3,1,0,2];
cName ={'yellow','red','green','blue'};
for ind=1:length(color)
    switch color(ind)
        case 0
            disp(cName{1});            
        case 1
            disp(cName{2});
        case 2
            disp(cName{3});
        case 3
            disp(cName{4});
    end
end

Handling this problem in an even simpler for loop would be rather easy as well

color=[2,1,3,0,1,3,1,0,2];
cName ={'yellow','red','green','blue'};
for ind= color
    disp(cName{ind+1});
end

[Skomantas Tamulaitis]

That's perfect, thanks a lot!