How to use the "switch ......case....end" syntax when the case number is variant, ?

Dear all:

My subject number would change from time to time. I could find out the number during the images processing, and label the subject one by one. According to the labeled number, I could find my subject one by one by a for loop syntax like that:

for n=1:MaxmiumLabeledNumber
    for l=1:47    (the maxmium slice number of images)
        for p=1:512
            for q=1:512
               if images(p,q,l)=n
                  ...... 
               end
            end
        end
     end
end

If it can be changed in "switch...case...end" syntex, the processing speed would be increased by MaxmiumLabeledNumber.

      for l=1:47
         for p=1:512
            for q=1:512
               switch images(p,q,l)
                  case 1
                ......
                  case 2
               ......
                  case 3
               ......
               ......
                  case MaxmiumLabel
               ......
               end
             end
          end
       end

The question is how to use it by auto adapted list of cases

Thank you very much for your kindness.

Trison

[Jan]

Do you mean "if images(p,q,l)==n" with two equal signs?

Answer 1

[Jan]

You cannot use hard coded SWITCH/CASE blocks for a dynamically changing list of CASE statements.

Is the outer loop for n really needed? Would something like this work:

    for l=1:47
        for p=1:512
            for q=1:512
               n = images(p,q,l);
               ...... 
            end
        end
     end

?