Execute a group of 'if' statements in random order

Question

MANISH KUMAR 2016-7-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/295070-execute-a-group-of-if-statements-in-random-order

回答： Walter Roberson 2016-7-12

Suppose if we have few 'if' statements and I want these to be executed in random order. For example, here are given five 'if' statements one for each row of a matrix. In random execution, any 'if' statement may execute first and similarly rest functions.

X is a random matrix of order 5*10

 if any(X(1,:))         
X([4 5],:)=0;
 end       
if any(X(2,:))           
X(4,:)=0;      
 end      
if any(X(3,:))         
 X(5,:)=0;      
 end      
 if any(X(4,:))           
X(2,:)=0;      
 end        
if any(X(5,:))
X([1 3],:)=0;
 end

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Answer 1

Walter Roberson 2016-7-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/295070-execute-a-group-of-if-statements-in-random-order#answer_228406

在 MATLAB Online 中打开

order_to_use = randperm(NumberOfConditions);
for idx = 1 : length(order_to_use)
  switch order_to_use(idx)
    case 1: if any(X(1,:)); X([4 5],:)=0; end
    case 2: if any(X(2,:)); X(4,:)=0; end
    ...
  end
end