Generate random integer

Question

Nurul 2011-3-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/3712-generate-random-integer

Hi,

Can anyone help me to generate several strings of random integer ? In each string, there must be 5 integers generated which the number are in between 1 and 484. let say i wanna have 5 strings of the number. below is the example of the matrix that i need.

random number = [ 4 56 32 75 103; 47 84 302 400 27; 96 187 255 33 14; 387 293 135 34 73; 165 243 93 142 65 ]

Thanks in advanced.

nurul

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2011-3-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/3712-generate-random-integer#answer_5350

在 MATLAB Online 中打开

ceil(484 * rand(5,5))

Note that this has the possibility of generating the same number multiple times. There are slightly different techniques if you require them to be unique along rows or columns.

2 个评论
显示无隐藏无

Nurul 2011-3-22

thanks for your answer as this is what i need for this time. But, what are the technique if i want the number to be unique in each rows and column?

Walter Roberson 2011-3-22

The technique that is often used to satisfy uniqueness is to use randperm() to select the elements. Roger Stafford has a much more efficient technique, though; unfortunately I don't understand his algorithm. See for example http://www.mathworks.com/matlabcentral/newsreader/view_thread/149228

I do not recall at the moment the techniques for ensuring that values are unique in both their row and column and yet allowing the value to occur in a different place in the matrix. If the value has to be unique throughout the entire matrix then you just do it like the row or column case and then reshape the result.

请先登录，再进行评论。