How can I select a random number from a set multiple times without it selecting the same number twice?

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Katerina Tetzloff 2015-11-13

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编辑： Stephen23 2015-11-14

I want matlab to spit back all of the numbers 1:10 in a random order, one at a time, without repeating a past response. How can I do this? Right now I have

i=1:10; 
s=Sample(i)

But the problem is that it doesn't return all the numbers in the vector before repeating a response.

Thank you!!!

Edit: Basically, I have 10 image files, and I want to display them in a random order but one at a time. I want to use randperm to create a random vector of 1:10, and then have it pull images one at a time.. so if the permutation is, for example, 10 1 7 3 2 4 9 8 5 6, it would make command it to putimage(10, window), user clicks button, and then it goes to putimage(1).. putimage(7)... and so on.

The image files are just 1.jpeg so I am planning to use sprintf to write the number into putimage

Thanks!!

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Answer 1

Stephen23 2015-11-13

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https://ww2.mathworks.cn/matlabcentral/answers/254658-how-can-i-select-a-random-number-from-a-set-multiple-times-without-it-selecting-the-same-number-twic#answer_199703

编辑：Stephen23 2015-11-13

在 MATLAB Online 中打开

for k = randperm(10)
    disp(k)
    ... do something with k
end

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Stephen23 2015-11-13

编辑：Stephen23 2015-11-14

在 MATLAB Online 中打开

EDIT: The OP posted a long comment about wanting to do something with image files, but deleted it. My response anyway:

for k = randperm(10)
    str = sprintf('%d.jpg',k);
    ... your code here
end

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Answer 2

Adam 2015-11-13

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https://ww2.mathworks.cn/matlabcentral/answers/254658-how-can-i-select-a-random-number-from-a-set-multiple-times-without-it-selecting-the-same-number-twic#answer_199701

在 MATLAB Online 中打开

randperm( 10 );

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Katerina Tetzloff 2015-11-13

If I use randperm(10) it gives me an array. How can I get it to give me one number at a time but still not repeat?

Adam 2015-11-13

You can use the array in exactly the same way as you would, I assume use the array 1:10 to show the images in a specific order.

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