create an array

I wonder how I can make an array (200,400) with values 0 to 7 which randomly distributed? I apperciate your help.

 采纳的回答

rand(200,400)*7

2 个评论

thanks Andrei. I wonder how I can group each value in the array. for eaxmple (1:20,1:20)=1,(40:70,40:70)=2 and so on.
thanks but can you please show it with an example?

请先登录,再进行评论。

更多回答(1 个)

szs = [20 20 30]; %sizes
vals = [1 0 2]; %values
C = cellfun(@(c,v)ones(c)*v,num2cell(szs),num2cell(vals),'uni',false);
M = blkdiag(C{:});

3 个评论

like
C = arrayfun(@(i1)ones(szs(i1))*vals(i1),1:3,'un',0);
Nicer!
I don't think I've ever used arrayfun()
thanks a lot Sean and Andrei.

请先登录,再进行评论。

类别

帮助中心File Exchange 中查找有关 Loops and Conditional Statements 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by