关于Matlab的内置函数cat理解

现设im1与im2的size均为32x32x100的数据。

那么，A=[im1 im2] 与 B=[im1;im2]的size是多少呢？

答案：size(A)=32x64x100; size(B)=64x32x100。

这个看上去不太好理解，如果把 A=[im1 im2]=cat(2,im1,im2)更容易理解一些。同理，B=[im1;im2]=cat(1,im1,im2)。

同理可知，C=cat(3,im1,im2)，则size(C)=32x32x200；D=cat(4,im1,im2)，则size(D)=32x32x100x2。

H=cat(5,im1,im2)，则size(H)=32x32x100x1x2；F=cat(6,,im1,im2)，则size(F)=32x32x100x1x1x2；

%CAT Concatenate arrays.
%   CAT(DIM,A,B) concatenates the arrays A and B along
%   the dimension DIM.  
%   CAT(2,A,B) is the same as [A,B].
%   CAT(1,A,B) is the same as [A;B].
%
%   B = CAT(DIM,A1,A2,A3,A4,...) concatenates the input
%   arrays A1, A2, etc. along the dimension DIM.
%
%   When used with comma separated list syntax, CAT(DIM,C{:}) or 
%   CAT(DIM,C.FIELD) is a convenient way to concatenate a cell or
%   structure array containing numeric matrices into a single matrix.