how can I generate a random matrix?
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hello guys, what code can i use to generate a mxn matrix provided that the value is from 1 to x(depending on the desire of user) and the values should be unique from each other. :)
1 个评论
Image Analyst
2012-10-7
There is a help facility in MATLAB (beyond the Answers forum). It's right there built into MATLAB. For things like this you can use the help documentation. So you can either type "help random" "doc random" into the command window, or click the question mark icon, or (in older versions) get help from the menus. Or you can click in a word in the editor and type F1. For things like this (random) you'd get faster help by using the built-in help.
采纳的回答
Matt Fig
2012-10-7
You will of course have to make sure that x==m*n, as you describe it.
f = @(x,m,n) reshape(randperm(x),m,n);
f(20,5,4)
ans =
4 9 12 2
17 1 8 16
19 7 6 18
5 3 14 13
20 11 15 10
3 个评论
jelly
2012-10-7
Azzi Abdelmalek
2012-10-7
A=randperm(x)
out=reshape(A(1:40),10,4)
Matt Fig
2012-10-7
Or, if your version of MATLAB supports it:
f = @(x,m,n) reshape(randperm(x,m*n),m,n);
f(43,,10,4)
ans =
40 25 43 16
3 9 11 2
19 36 29 26
37 32 8 27
7 38 12 31
33 41 35 39
22 20 42 1
30 4 24 15
10 17 5 23
28 34 6 21
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