如何通过Matlab程序将1D转换为2D [英] How to convert 1D to 2D by Matlab program

问题描述

我想问一个关于Matlab程序的问题.

I would like to ask a question about Matlab program.

我有向量a

a = [1 2 3 4 5 6 7 8 9 10 11 12];

我想将向量a转换为2D数组.通常，我使用此代码对其进行转换.

I would like to convert vector a to 2D array. Normally, I use this code to convert it.

m =1;
for i=1:4
   for j=1:3
      b(i,j) = a(m);
      m=m+1;
   end
end

然后b是2D矩阵.

b =

     1     2     3
     4     5     6
     7     8     9
    10    11    12

任何人，都可以在不使用循环的情况下将1D转换为2D.

Anybody, have an idea to convert 1D to 2D without using loop.

谢谢

推荐答案

查看

Check out the reshape function and help page.

尤其是

B = reshape(A,m,n)

返回m -by-c5>矩阵B，其元素是从A逐列获取的.如果A没有m*n元素，则会导致错误.

returns the m-by-n matrix B whose elements are taken column-wise from A. An error results if A does not have m*n elements.

请注意，它是按列排列的，因此建议您制作一个具有3行4列的矩阵，然后将其倾斜到侧面(A.'将对矩阵进行转置).

Note that it is column-wise, so I suggest you make a matrix with 3 rows and 4 columns and then tip it on its side (A.' will take the transpose of a matrix).

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