How to generate array (x:2)

2019 1 12
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更新时间：2019 1 12
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How to generate array (x:2) with numbers from 1:24 without 7 numbers that i will write myself and(x,1) cannot equal (y,2). There should be 17*16=272 possibilities, so array should be 272x2. Please help.

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madhan ravi
madhan ravi 2019-1-12

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Perhaps ?
v = 1 : 24;
[x,y]=ndgrid(v);
Result=[x(:) y(:)];
Result=Result(randperm(272),:)

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Andrzej Nowak
Andrzej Nowak 2019-1-12
for i=1:272
if(Result(i,1)==Result(i,2))
x=4;
end
end
I used it to see if there are equal numers in 1 and 2 and there are ;/
Andrzej Nowak
Andrzej Nowak 2019-1-12
编辑：Andrzej Nowak 2019-1-12
Maybe i will explain what am I doing. I create poker machine. In poker players have 2 cards on hand. There are 2 players and cards are from 9 to Ace.
In my program i describe my cards as numbers from 1 to 24. Program starts when there is a flop(3 cards on table). Than it comes 4th card and 5th card on table. When there are 2 players with 2 cards and flop has 3 cards there are 7 cards that we know. I made table where are this cards. Now i need add to this table possible cards on turn(4th card on table) and river(5th card on table). They cannot be the same so there are 272 possibilities because 24-7 = 17. 17*16=272.
madhan ravi
madhan ravi 2019-1-12
编辑：madhan ravi 2019-1-12
clear all
v = 1 : 24;
[x,y]=ndgrid(v);
Result=[x(:) y(:)];
Result=Result(randperm(size(Result,1)),:);
Final=Result(Result(:,1)~=Result(:,2),:);
Final=Final(randperm(272),:) % desired result
any(Final(:,1)==Final(:,2)) % to check if any column repetitions occur
any(ismember(a(1:2:end,:),a(2:2:end,:),'rows')) % to check if any row repetitions occur
size(Final) % desired size
Andrzej Nowak
Andrzej Nowak 2019-1-12
Thank you very much. I will test it.
madhan ravi
madhan ravi 2019-1-12
Anytime :) , sure!

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更多回答（2 个）

Image Analyst
Image Analyst 2019-1-12

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Not exactly sure I follow your description, but it sounds like setdiff() will be involved:
v = 1 : 24;
numbersToExclude = randperm(24, 7)
finalNumbers = setdiff(v, numbersToExclude)
I have no idea what array(x:2) means. Or (x, 1) and (y, 2) for that matter.
I also don't know why there should be more than one possibility unless you're going to scramble the numbers after you get them.

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Andrzej Nowak
Andrzej Nowak 2019-1-12
编辑：Andrzej Nowak 2019-1-12
This is (34:2) array. (2,1) =10 (1,1) = 5 . As yo can see on 18 possition there are two 2 and i dont want this.
I used p=randi (17,272,2);
Image Analyst
Image Analyst 2019-1-12
If you don't want repeats in your array, m, I suggest you create a lot more than you need, like a hundred or a thousand rows instead of 34, then delete rows with repeats.
repeatRows = m(:, 1) == m(:, 2); % Find rows where col 1 = col 2
m(repeatRows = []; % Delete/remove those rows;
% Crop to the 34 that you need.
m = m(1:34, :);
Andrzej Nowak
Andrzej Nowak 2019-1-12
编辑：Andrzej Nowak 2019-1-12
it doesn't work i need exacly 272 combines of cards. and when i use it the number is not always 272.
With your idea there can be the same rows eq 1 2 and 1 2 .idk how to eliminate them.

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Image Analyst
Image Analyst 2019-1-12

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Try this:
[x, y] = ndgrid(1:17, 1:17)
data = [x(:), y(:)];
repeatRows = data(:, 1) == data(:, 2); % Find rows where col 1 = col 2
data(repeatRows, :) = []; % Delete/remove those rows;
data is now 272 by 2 -- every possible combination with no repeats. If you want to scramble the order, you can use
% Scramble the order
order = randperm(size(data, 1));
data = data(order, :)

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